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[Nemesis]

Link to beginning of original thread
Link to end of original thread

All discussions and proposed additions should be made in the original thread.

We also now have a website with the list on it.

Link to the whole list.  This copy only lists names, categories and links, no descriptions.

Links to sublists:

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The sublist will include a quote about each program from the authors where possible and may in individual cases include commentary from myself or others.

Audio, Video and Graphics Software
File transfer programs
Games
Miscellaneous
Networking
Office Software
Operating Systems:  Divided into 3 posts.
 - BSD Unix Variants
 - Linux Variants
 - Other Operating Systems
Programming tools and source code
Security Software
Utilities A - M
Utilities N - Z
Web Tools
Websites with collections of software

My thanks to all the contributors.

Age, Bonk, Dracho, Iconoclast::toasty0, Jack Morris, Javora, KBF-Kurok, Lepton, Midnight Tech, MrCue, Musashi NCC-BR549, NJAntman, Pestalence_XC, The Postman, Redshift the Kook, Sarek, Stephen NCC -73070, Mr_Tricorder

One contributor does single himself out for the sheer bulk of his contributions - Bonk.  So a very special thankyou to Bonk for his efforts.

Before including a link here I verify it as accurate as of this time.  Any link whose software is not freely available (at the time of update) I remove, limited time free trials are not included on this list.  Free for home or academic use programs I do include.  Any whose link was invalid and an update not easily found I also do not include.  Some exceptions may be made, this is a guidline only.

If there are any errors, ommisions or corrections not covered by my comments above feel free to either post a correction/update in the original thread (Links Below) or PM it to me and I will edit it in at my earliest convience.  This thread is kept locked to allow people to find the updated list easily without having to search a multipage thread to find the list (as suggested by Javora).  Any post relavent to this list should be posted to the original thread (Links below)

If you need/want a program type that is not listed here post a request for it in the original thread (Links Below) and I (or others) will endeavor to find it.  A number of the links above came from such requests already.

Link to beginning of original thread
Link to end of original thread

[Nemesis]

This list is periodically updated to reflect postings.

Audio, Video and Graphics Software:  Link to sublist

A9CAD - 2D CAD program
A9Converter - convert to and from AutoCAD format
Art of Illusion - 3d modelling
Audacity - Sound Editor
Blender - 3d modeling
BRL-CAD - CAD program (U.S. Military origin)
CadStd Lite - CAD program exports to AutoCAD format
DESI-III - CAD program
Draft IT - 2D CAD program
DVDShrink - Movie DVD Copying.  Legal? - check locally.
ExpressSCH & ExpressPCB - electronics CAD programs
The Gimp - Image editor
irfanview - image viewer
Picassa - find, edit and share pictures
POV-Ray - Persistence of Vision Raytracer 3D Graphis creation
QCad - 2D CAD system
REAPER - Sound Editor
SeaSolution v1 - CAD for ships
Switch - Audio File Converter
Videolan - media player
VirtualDub - is a video capture/processing utility for Windows
Wings 3D - modelling program

File transfer programs:  Link to sublist

Filezilla - FTP download program.  Allows stops and restarts
Getright - FTP download program.  Allows stops and restarts
Star Downloader - Download accellerator

Games:  Link to sublist

Allegiance - Game open sourced by Microsoft (license?)
The Battle for Wesnoth - A turn-based strategy game with a fantasy theme.
C-evo - Civilization style game
Cube 2: - Games based on the Cube and Cube 2 game engine
Eternal Lands is a FREE MMORPG Windows, Mac, and Linux
Freeciv - Civilization clone (network playable)
FreeCol - Clone of Colonization
Freedroid - Paradroid clone
FreeOrion - Master of Orion style game
Frozen Bubble bubble bobble (?) clone
Globulation 2 - real time strategy game
GLtron TRON lightcycle style game
LBreakout2 - Advanced Breakout clone
NetHack - (ASCII graphics) a single player dungeon exploration game
Nexuiz a 3d deathmatch game Windows, Mac, and Linux
Pingus - a free Lemmings clone
Sokoban YASC - Yet Another Sokoban Clone Game
Space Invaders OpenGL - based on the arcade game
Starport: Galactic Empires massively multiplayer action strategy game
Stella - Atari 2600 Emulator
Super Star Trek - Classic DOS Trek game
The TA Spring Project- Total Annihalation clone
TrueCombat:Elite - Derived from Wolfenstein: Enemy Territory
UFO: ALIEN INVASION - strategy game
VegaStrike - game
Vega Strike Mod - Privateer - Wing Commander Privateer clone
WinUAE - Amiga Emulator
101 Free Games - Collection site

Miscellaneous:  Link to sublist

Asterisk® - the Open Source PBX!
Celestia - The free space simulation
Free Clipart
Free-Clipart.Com
FreePBX Configuration tool for Asterisk (see above)
GCompris - is an educational software suite
Moodle - is a course management system
GNU Octave - is mostly compatible with MATLAB
Plone - a content management framework
World Wind - from NASA

Networking:  Link to sublist

Samba - Networking software
Virtual Server 2005 - R2 Enterprise Edition for Free
WinTC - Traffic Controller is an NT service program that controls outbound network bandwidth.


Office Software:  Link to sublist
 
AbiWord - Word Processor
MySQL - database
The OpenCD - windows software collection
Openoffice. org - Office Suite
Oracle - Database 10g Express Edition
PDFCreator - Sets up as a printer and allows any program that can print create a PDF.
Scribus - Desktop Publishing
Tesseract - OCR
WordPress -  is a state-of-the-art semantic personal publishing platform

Operating Systems: 

Note: Due to the sheer number of BSD and Linux versions all links for them are on their sublist.
BSD Unix Variants  BSD Unix links
Linux Variants Linux links
Other Operating Systems Link to Sublist for other systems
Distrowatch - links to many Linux versions
FreeDOS - MS-DOS compatible OS
GNU - OS and tools.
Haiku - Open Source version of BeOS
MenuetOS -  64bit OS
ReactOS Windows XP clone in Alpha
QNX - Realtime OS - membership required for download
Syllable - Posix (mostly) compatible OS similar to BeOS

Programming tools and source code:  Link to sublist

AntiCutAndPaste
ClanLib - cross platform C++ framework
Crystal Space - portable 3D Game Development Kit written in C++
FMSLogo - A Logo programming environment
FreeBASIC - MS-QuickBASIC compatible for DOS Linux and Windows
Free Pascal - programming language
GLBasic - portable flexible BASIC
The GNU Scientific Library (GSL) - libraries for developing scientific software
The Irrlicht Engine - high performance realtime 3D engine written and usable in C++
Microsoft .NET Framework SDK
OGRE - open source real time 3D rendering engine.
PLIB - libraries for realtime interactive and portable applications
Quake 1-3 Source Code - open sourced by ID Software
Sharp Develop
Visual Studio 2005 - Prerelease Software
WinMerge - text file differencing and merging tool
XBasic - Programming Language

Security Software:  Link to sublist

a-squared Free- antispyware
AVG Anti-Virus - Anti-Virus
Avira AntiVir - Anti-Virus
Comodo Firewall - free firewall
iSafer Winsock Firewall - free firewall
Lavasoft Ad-Aware- antispyware
GnuPG - encryption software
Mailwasher - anti-spam
Microsoft Windows Defender (Beta 2)  time limited.
SoftPerfect Personal Firewall - free firewall
Spybot- Search & Destroy - antispyware
TrueCrypt - Free Open-Source Disk Encryption Software
Zonealarm firewall Note: This software did have a "call home feature".

Utilities:  Link to sublist A-M
Link to sublist N-Z

Boot Disks- and utilities and tweaks
CPU-Z - gathers information on your system.
DAEMON Tools - a virtual cd/dvd-rom emulator
Dead-Disk-Doctor - Recover files from "dead" disks
Deepburner - CD/DVD Burner software
DOSBox - Use DOS programs.
GCPUID - provided CPU info.
GNU Emacs - Text editor
GpsDrive - GpsDrive is a car (bike, ship, plane) navigation system.
Hard Disk Tools - Partition,  Imaging and Backup Software
HP USB Disk Storage Format Tool - Make USB Flash Drives bootable.
Memtest86 - A Stand-alone Memory Diagnostic
Notepad 2 - Notepad replacement
NoteTab - Tabbed note pad with extensive abilities
Nullsoft - Scriptable Install System
Screen Hunter - Screen Capture utility
7-Zip - Winzip replacement
SISoft - benchmarking utility
TeamSpeak - Voice over IP (VoIP) group communications software.
The Ultimate Boot CD - CD of recovery and repair tools
The Ultimate Windows Boot CD - You need an installed XP to make this one.
UPX - Executable packer
VIM 7 - Text editor
VMWare - Virtual machine
VMware Server
Ventrilo - Voice over IP (VoIP) group communications software.

Web Tools:  Link to sublist

Abyss - web server
Accessify.com - Tools, wizards, articles and tutorials on Web Accessibility
AOLServer - web server
Apache - web server
Coppermine - Photo Gallery
CreaText - XHTML Text Editor
CSS Validation Service
Democracy Broadcast Machine
Democracy PlayerWatch Internet TV with Democracy Player
eAccelerator - PHP accelerator
Firefox - web browser
Firefox extensions - extended functions for Firefox browser.
Geeklog - application for managing dynamic web content
JAlbum - gallery software makes web albums of your digital images
Link Checker - online utility that checks links in a web page.
Lynx - text based web browser.
Markup Validation Service - a free service that checks Web documents in formats like HTML and XHTML for conformance to W3C Recommendations and other standards.
Maxthon - Tabbed Browser IE Extension
MoinMoin - Wiki Engine
NVU Web - authoring
Onlinetools.org - This is a collection of scripts, tools and software add-on
Opera - Web Browser
PHP - web scripting language
Roxen - Webserver
Sambar Serve - an all-in-one web operating system
Seamonkey - web browser suite Formerly Mozilla.
Simple Machines - Forum software
Thunderbird - E-Mail program
Thunderbird - Extended functions for Thunderbird E-Mail program
xitami - webserver
Zend Optimizer - PHP accelerator

Websites with collections of  software:  Link to sublist

The 46 Best-ever Freeware Utilities
CleanSoftware - source of further software
Download.com
thefreecountry - Free Programmers', Webmasters' and Security Resources
Free Software Directory - a project of the Free Software Foundation
Freesticky
Newfreeware
Nonags
OSDir - lists of stable free software
Pricelessware - source of further software
Snapfiles - collection
Software driver collection - is a state-of-the-art semantic personal publishing platform
Tucows
Tutorialized.com - Free tutorials in 515 categories
ZDNet

[Nemesis]

Link to top of thread
Link to master list

Security Software

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a-squared Free- antispyware

Security must not be a privilege. Under this motto, Emsi Software provides the Malware scanner a-squared Free completely free of charge for private use. But it is not a very limited version, it is a full tool to clean your computer from Malware. Not only Spywares, as detected by classic Anti-Spyware programs, but also especially Trojans, Backdoors, Worms, Dialers, Keyloggers and a lot of other destructive pests, which makes it dangerous to surf the web.

OS: Win98 - Win XP

AVG Anti-Virus

AVG Anti-Virus Free and ewido anti-spyware Free is for private, non-commercial, single home computer use only.

OS: Windows (versions?), Linux

Avira AntiVir

Avira AntiVir PersonalEdition Classic reliably protects your private computer against dangerous viruses, worms, Trojans and costly dialers.

More than 15 million users worldwide trust in the reliable protection of Avira AntiVir. And this is no coincidence at all: Avira has gained several awards. The product combines first-class detection rates and ease of use with a top performance that protects your computer safely and hardly burdens older PC

OS: Win98 - Win XP, Linux, FreeBSD, Solaris

Comodo Firewall - free firewall

Unfortunately, most firewalls leak. But Comodo's Firewall is unique in that it passes all known leak tests to ensure the integrity of data entering and exiting your system. Comodo has put our firewall through all kinds of sophisticated tests to ensure our firewall is powerful enough to ward off these attacks with default settings. No other firewall has had to work this hard. Take this test yourself.

OS: Win2000 - Win XP

GnuPG - encryption software

The GNU Privacy Guard

GnuPG is the GNU project's complete and free implementation of the OpenPGP standard as defined by RFC2440 . GnuPG allows to encrypt and sign your data and communication, features a versatile key managment system as well as access modules for all kind of public key directories. GnuPG, also known as GPG, is a command line tool with features for easy integration with other applications. A wealth of frontend applications and libraries are available.

GnuPG is Free Software . It can be freely used, modified and distributed under the terms of the GNU General Public License .

OS: Win95 - Win XP, Mac OS X, Linux, BSD,
Open Source

iSafer Winsock Firewall - free firewall

iSafer firewall is used to protected your PC against spywares, spamwares. It is also a good example for software developers to understand the basic knowledge about firewall. NOTE: Visit http://winsockfirewall.sourceforge.net to see more...

OS: Win95 - Win XP
Open Source

Lavasoft Ad-Aware- antispyware

Lavasoft is the industry leader and most respected provider of anti-spyware solutions. Lavasoft develops and delivers the highest quality antispyware solutions to keep your computer or network free of compromising and intrusive threats to your privacy

OS: Win98 - Win XP

Mailwasher - anti-spam

MailWasher Free is a spam detection and mail preview tool that allows you to check the mail on the server and delete any spam before you download it to your local computer. It can notify you when new mail arrives and automatically mark suspicious messages, so you can preview and delete them. There are 3 levels of spam detection, and you can specify your own filters. MailWasher also offers the option to exclude your friends from spam checking and check mail against public blacklists. The program requires you to create your own spam filters, without them, the spam detection is poor. If you want to create your own mail filters, give MailWasher a try. However, if you are looking for effective out-of-the-box spam filtering, you should look elsewhere. The free version is limited to one POP3 email account, and has several features disabled.

OS: Windows (all?)

Microsoft Windows Defender (Beta 2)  time limited.

Windows Defender (Beta 2) is a free program that helps protect your computer against pop-ups, slow performance, and security threats caused by spyware and other unwanted software. It features Real-Time Protection, a monitoring system that recommends actions against spyware when it's detected, and a new streamlined interface that minimizes interruptions and helps you stay

OS: Win2000 (SP 4) - Win XP

SoftPerfect Personal Firewall - free firewall

The SoftPerfect Personal Firewall is a free network firewall designed to protect your PC against attacks from the Internet or via a local area network. SoftPerfect Personal Firewall offers customizable security using user-defined rules for packet filtering. It works at a low level and also allows you to create rules based on non-IP protocols such as ARP.

OS: Win95 - Win XP

Spybot- Search & Destroy - antispyware

Spybot - Search & Destroy detects and removes spyware, a relatively new kind of threat not yet covered by common anti-virus applications. Spyware silently tracks your surfing behaviour to create a marketing profile for you that is transmitted without your knowledge to the compilers and sold to advertising companies.

OS: Windows (versions?)

TrueCrypt - Free Open-Source Disk Encryption Software

Free open-source disk encryption software for Windows XP/2000/2003 and Linux
Main Features:

    * Creates a virtual encrypted disk within a file and mounts it as a real disk.
    * Encrypts an entire hard disk partition or a device, such as USB flash drive.
    * Encryption is automatic, real-time (on-the-fly) and transparent.
    * Provides two levels of plausible deniability, in case an adversary forces you to reveal the password:
      1) Hidden volume (steganography – more information may be found here).
      2) No TrueCrypt volume can be identified (volumes cannot be distinguished from random data).
    * Encryption algorithms: AES-256, Blowfish (448-bit key), CAST5, Serpent, Triple DES, and Twofish.
      Mode of operation: LRW  (CBC supported as legacy).

OS: Win2000 - Win XP, Linux
Open Source.

Zone Alarm Firewall
Note: This software did have a "call home feature".

Firewall Protection

Easy-to-use firewall blocks hackers and other unknown threats.

    * Systematically identifies hackers and blocks access attempts
    * Automatically makes your computer invisible to anyone on the Internet

OS: Win2000 - Win XP

[Nemesis]

Link to top of thread
Link to master list

Audio, Video and Graphics Software

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A9CAD - 2D CAD program

A9CAD is a general purpose two-dimensional CAD program. It supports industry standard DWG & DXF drawing formats.

OS: Win98 - Win XP

A9Converter - convert to and from AutoCAD format

A9Converter is a bi-directional DWG/DXF conversion program. It supports up to Autocad 2006.

OS: Win98 - Win XP

Art of Illusion - 3d modelling

Art of Illusion is a free, open source 3D modelling and rendering studio. It is written entirely in Java, and should be usable on any Java Virtual Machine which is compatible with J2SE 1.4 or later.

OS: Java Virtual Machine
Open Source

Audacity - Sound Editor

The Free, Cross-Platform Sound Editor
Audacity is free, open source software for recording and editing sounds.

OS: Win98 - Win XP, Linux, and Mac OS X
Open Source

Blender - 3d modeling

Blender is a cross plaform 3D creation suite, allowing fully integrated modeling, animation, rendering, post production and interactive 3D creation and playback.

OS: Win98 - Win XP, Linux, Mac OS X (intel and PPC), Irix, Solaris, BSD

BRL-CAD - CAD program (U.S. Military origin)

The BRL-CAD package is a powerful Constructive Solid Geometry (CSG) solid modeling system with over 20 years development and production use by the U.S. military. BRL-CAD includes an interactive geometry editor, parallel ray-tracing support for rendering and geometric analysis, path-tracing for realistic image synthesis, network distributed framebuffer support, image-processing and signal-processing tools. The entire package is distributed in source code form.

Since it it distributed in source code you must have the compiling tools and knowledge to make an executable program out of it.
OS: ?
Open Source

CadStd Lite - CAD program exports to AutoCAD format

CadStd is a general purpose, easy to learn CAD/drafting program for creating professional quality mechanical designs, house plans, blueprints, schematics and charts utilizing ANSI drawing standards. The Lite version is free and can read any drawing created by the Pro version. CadStd Lite can export files as DXF so you can share your drawings to your friends with other CAD programs like Autocad.

OS: Windows

DESI-III - CAD program

DESI-III uses a real database for the organisation of the drawings and drawing entities: which allows to use any stored drawing as a symbol in any other drawing. Symbols (drawings) can be composed of entities and symbols, which are composed of entities and symbols, which...: DESI-III uses a level structure in a drawing.

OS: Win95 (via DOS), Linux (Via DOSemu), OS/2

Draft IT - 2D CAD program

Draft IT is a powerful and easy-to-use 2D CAD software for suitable for all users, in the office or at home. You can create, print and save your own drawings and designs.

OS: Win98 - Win XP
Open Source

DVDShrink - Movie DVD Copying.  Legal? - check locally.

DVD Shrink enables you to copy a DVD very easily. Copying a DVD doesn't get much simpler than this. Put DVD into DVD-ROM or DVD burner. Choose either either a Full Disk (1:1) copy or a main movie only. It'll analyze DVD, encode video files , and finally burn a copy of the dvd to DVD±R media. Thus you have a excellent quality dvd copy of your original DVD.

OS: Windows (versions?)

ExpressSCH & ExpressPCB - electronics CAD programs

Both programs are completely free, fully functional and easily installed with a single InstallShield setup program. They run with Windows 98 through XP.

Learning to use our software is fast because of its standardized Windows user interface. After spending the few minutes to learn one, the other takes almost no time because it works the same way.

Note: ExpressPCB offers a service manufacturing PCBs designed with this software.
OS: Windows?

The Gimp - Image editor

GIMP is an acronym for GNU Image Manipulation Program. It is a freely distributed program for such tasks as photo retouching, image composition and image authoring. The terms of usage and rules about copying are clearly listed in the GNU General Public License.

OS: Win98 - Win XP, Mac OS X (with X11), Linux, BSD, Solaris
Open Source

irfanview - image viewer

IrfanView is a very fast, small, compact and innovative FREEWARE (for non-commercial use) graphic viewer for Windows

OS: Win9x - Win XP

Picassa - find, edit and share pictures

Picasa is software that helps you instantly find, edit and share all the pictures on your PC. Every time you open Picasa, it automatically locates all your pictures (even ones you forgot you had) and sorts them into visual albums organized by date with folder names you will recognize. You can drag and drop to arrange your albums and make labels to create new groups. Picasa makes sure your pictures are always organized.

OS: Win200 - Win XP

POV-Ray - Persistence of Vision Raytracer 3D Graphis creation

The Persistence of Vision Raytracer is a high-quality, totally free tool for creating stunning three-dimensional graphics. The source code is available for those wanting to do their own ports.

OS: Win9x - Win XP (IE 2 or later), Mac OS (9.2+), Mac OS X (10.2.8+), Linux (x86)

QCad - 2D CAD system

QCad is a free open-source 2D CAD system for Linux, various Unices and Windows. The developers' main goals are to build a stable, fast and easy to use CAD for everyone. One doesn't need any knowledge of a CAD program to start working with QCad.

OS: Win98 - Win XP, Mac OS X, Linux
Open Source

REAPER - Sound Editor

Windows application designed for the recording, arrangement, editing, mixing and rendering of audio. REAPER provides a flexible but easy to use interface that is equally suited to amateurs and professionals alike.

OS: Windows (all?)

SeaSolution v1 - CAD for ships
SeaSolution v1 - download link

Sea Solution is a CAD system for shipbuilding.

Sea Solution is a comfortable tool for geometrical simulation and design, especially for fairing lines and shell plates development.

Note:  Current version is 6.x they allow give away V1.x as a free intro

Switch - Audio File Converter

Switch sound file conversion software is an audio file format converter for windows. It can convert audio files from many different file formats into mp3 or wav files, including wav to mp3, au to mp3, aiff to mp3 and much more.

OS: Win95 - Win XP, Mac OS X, Linux (under Wine)

Videolan - media player

VLC media player 0.8.5
    * It is a free cross-platform media player
    * It supports a large number of multimedia formats, without the need for additional codecs
    * It can also be used as a streaming server, with extended features (video on demand, on the fly transcoding, ...)

OS: (Win9x and ME - maybe), Win 2000 - Win XP, Linux, Mac OS X, BeOS
Open Source

VirtualDub - is a video capture/processing utility for Windows

VirtualDub is a video capture/processing utility for 32-bit Windows platforms (95/98/ME/NT4/2000/XP), licensed under the GNU General Public License (GPL).  It lacks the editing power of a general-purpose editor such as Adobe Premiere, but is streamlined for fast linear operations over video.  It has batch-processing capabilities for processing large numbers of files and can be extended with third-party video filters.  VirtualDub is mainly geared toward processing AVI files, although it can read (not write) MPEG-1 and also handle sets of BMP images.

OS: Win95 - Win XP
Open Source

Wings 3D - modelling program

Wings 3D is a subdivision modeler inspired by Nendo and Mirai from Izware.

OS: Windows (OGL), Mac, Linux, Unix
Open Source

[Nemesis]

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File transfer programs

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Filezilla - FTP download program.  Allows stops and restarts

FileZilla is a fast FTP and SFTP client for Windows with a lot of features. FileZilla Server is a reliable FTP server.

OS: WinNT - Win XP
Open Source

Getright - FTP download program.  Allows stops and restarts

GetRight® Download Manager
The award winning Download Manager and Download Accelerator software for Windows. GetRight simply improves and optimizes your downloads. Never have an incomplete or lost download again.

    * Accelerate speeds - download a file from several servers at once.
    * Manage downloads better - no more lost files, easily see what is in progress and find your finished downloads.
    * Recover downloads that are interrupted for any reason - lost connections, crashes, etc.

OS: Win95 - Win XP

Star Downloader - Download accelerator

Star Downloader is a download manager that accelerates your downloads by splitting the files into several parts and downloading them simultaneously. Download speeds are increased further by choosing the fastest mirror sites. Version 1.45 has Firefox 1.5 support and Internet Explorer Toolbar for fast searching.

OS: Win95 - Win XP

[Nemesis]

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Link to master list

Games

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Allegiance - Game open sourced by Microsoft (license?)
- Allegiance forums

Allegiance is a MMOG providing a mix of real-time strategy and player piloted space combat. Initially developed by Microsoft Research, the game was later open-sourced and now is maintained/developed by volunteers. Gameplay relies heavily on good teamwork and forward thinking. Players can fly a variety of craft, striving to destroy enemy team installations and protecting their own. Resource collection figures significantly in the game, since new technology can be expensive and money is usually scarce.

OS: Windows (Versions?)
Open Source (Microsoft License)

The Battle for Wesnoth -  is a turn-based strategy game with a fantasy theme.

The Battle for Wesnoth is a turn-based strategy game with a fantasy theme.

Build up a great army, gradually turning raw recruits into hardened veterans. In later games, recall your toughest warriors and form a deadly host against whom none can stand! Choose units from a large pool of specialists, and hand-pick a force with the right strengths to fight well on different terrains against all manner of opposition.

Wesnoth has many different sagas waiting to be played out. Fight to regain the throne of Wesnoth, of which you are the legitimate heir... step into the boots of a young officer sent to guard a not-so-sleepy frontier outpost... vanquish a horde of undead warriors unleashed by a foul necromancer, who also happens to have taken your brother hostage... guide a band of elvish survivors in an epic quest to find a new home.

200+ unit types. 16 races. 6 major factions. Hundreds of years of history. The world of Wesnoth is absolutely huge and limited only by your creativity - make your own custom units, compose your own maps, and write your own scenarios or even full-blown campaigns. You can also challenge up to 8 friends - or strangers - and fight in epic multi-player fantasy battles.

OS: Windows, Linux, MacOSX, BeOS, Solaris, FreeBSD, OpenBSD, NetBSD, AmigaOS4, OS/2
Open Source

C-evo - Civilization style game

C-evo is a freeware empire building game for Windows.
With a time scope of several thousand years, it covers aspects of exploration and expansion, industry and agriculture, warfare and diplomacy, science and administration. C-evo follows the spirit of popular turn-based strategy games from the mid 90s, but with more emphasis on powerful AI and careful design of the rules, resulting in a true challenge.

OS: Win95 or later
Open Source

Cube 2: - Games based on the Cube and Cube 2 game engine

Free single and multi player 1st person shooter game with some satisfying fast oldskool gameplay. A large variety of gameplay modes from classic SP to fast 1 on 1 MP and objective based teamplay, with a great variety of original maps to play on.

OS: Win95 - Win XP, Mac OS X, Linux, BSD
Open Source

Eternal Lands is a FREE MMORPG Windows, Mac, and Linux

Eternal Lands is a FREE MMORPG (massively multiplayer online role playing game) currently under development. The game is now in Beta stage, but that doesn't mean it's incomplete. It's currently fully playable and we are constantly working on adding more things to do, more items to make, monsters to fight, and also improving the current systems.

OS: Windows, Mac OS X, Linux
Open Source

Freeciv - Civilization clone (network playable)

Freeciv is a free turn-based multiplayer strategy game, in which each player becomes the leader of a civilization, fighting to obtain the ultimate goal: To become the greatest civilization.

Players of the Civilization® series by Microprose® should feel at home, since one aim of Freeciv is to have optional modes (called rulesets) with compatible rules.

Freeciv is maintained by an international team of coders and enthusiasts, and is easily one of the most fun and addictive network games out there!

That also means it has very extensive multilanguage support, something rare in games.

OS: Win95 - Win XP, Mac OS X, Linux
Open Source

FreeCol - Clone of Colonization

The FreeCol team aims to create an Open Source version of Colonization (released under the GPL). At first we'll try to make an exact clone of Colonization. The visuals will be brought up to date with more recent standards but will remain clean, simple and functional. Certain new 'features' will be implemented but the gameplay and the rules will be exactly the same as the original game. Examples of modern features are: an isometric map and multiplayer support.
This clone will be developed incrementally and result in FreeCol 1.0.0 which will be an almost exact Colonization clone. Incremental development basically means that we'll add features one at a time. This allows us to have a running program at all times and also to release an unfinished but working game once in a while.

OS: Java
Open Source

Freedroid - Paradroid clone

THE CLASSICAL FREEDROID: Freedroid is a clone of the classic game "Paradroid" on Commodore 64 with some improvements and extensions to the classic version.

In this game, you control a robot, depicted by a small white ball with a few numbers within an interstellar spaceship consisting of several decks connected by elevators.

The aim of the game is to destroy all enemy robots, depicted by small black balls with a few numbers, by either shooting them or seizing control over them by creating connections in a short subgame of electric circuits.

Development of this game is now complete.  The final version came out in august 2003 and runs on Linux, Mac OSX, Sharp Zaurus and even that strange Windows wannabe of an operating system.  Thanks to all who helped.  Minor fixes and maintainance will of course still continue though...

OS: Windows, Mac OS X, Linux, Zaurus.
Open Source

FreeOrion - Master of Orion style game
2nd Link

Players take the helm of a newly-spaceborne Empire to explore and colonize the stars. Sometimes thought of as "Civilization in space," FreeOrion's design also provides for a tactical combat engine along the lines of Homeworld and the Total War series.

OS: Win XP, Linux
Open Source

Frozen Bubble bubble bobble (?) clone

Full-featured, colorful animated penguin eyecandy, 100 levels of 1p game, hours and hours of 2p game, a level-editor, 3 professional quality 20-channels music tracks, 15 stereo sound effects, 7 unique graphical transition effects.

OS: Windows, Mac, Linux, BSD
Open Source

Globulation 2 - real time strategy game

Globulation 2 is an innovative Real-Time Strategy (RTS) game which reduces micro-management by automatically assigning tasks to units. Take a look at the screenshots or just download and try it right now. Globulation 2 is Free Software, licensed and distributed under the GNU General Public License.

OS: Windows, Mac, Linux
Open Source

GLtron TRON lightcycle style game

Well, as the name suggests, it's inspired by the movie TRON. Or more exactly, by all the games that where inspired by the movie TRON.

You steer a futuristic bike, called lightcycle. Combat takes place in a rectangular arena. Your bike leaves a trail behind, which is like a wall. The goal is to force the other players to drive into a wall. The winner is the last player alive.

OS: Windows, Mac OS9 - OS X, Linux
Open Source

LBreakout2

The successor to LBreakout offers you a new challenge in more than 50 levels with loads of new bonuses (goldshower, joker, explosive balls, bonus magnet ...), maluses (chaos, darkness, weak balls, malus magnet ...) and special bricks (growing bricks, explosive bricks, regenerative bricks ...). If you are still hungry for more after that you can create your own levelsets with the integrated level editor.

OS: Windows, Mac OS X, Linux, BeOS, Amiga OS 4, Macromedia flash (?)
Open Source

NetHack - (ASCII graphics) a single player dungeon exploration game

NetHack is a single player dungeon exploration game that runs on a wide variety of computer systems. But that's a very dry description. See the Guidebook for much more information, including the game commands.

OS: Windows, Mac, Linux?
Open Source

Nexuiz a 3d deathmatch game Windows, Mac, and Linux

   Nexuiz is a 3d deathmatch game project, created online by a team of developers called Alientrap. It is available for download for Windows, Mac, and Linux (all the same archive).The first version was released May 31st 2005, released entirely GPL and free over the net, a first for a project of its kind. Since the release the game is still being updated and developed, currently at version 2.1 and new releases being developed.

OS: Windows, Mac, Linux
Open Source

Pingus - a free Lemmings clone

Pingus is a free Lemmings clone for GNU/Linux and Windows covered under the GNU GPL. Pingus uses ClanLib  and libxml and might also be usable on some other OSs like FreeBSD, but hasn't been tested there. Pingus is mainly developed under GNU/Linux, that's why the Windows port is sometimes a bit behind.

Open Source

Sokoban YASC - Yet Another Sokoban Clone Game

Sokoban YASC - Yet Another Sokoban Clone - for Windows. Abundant game features, such as unlimited undo, path finding, reverse mode, and a replay mode. Good import functions, level editor, highly configurable, e.g., skinning.

OS: Win95 - Win XP
Open Source

Space Invaders OpenGL - based on the arcade game

Space Invaders OpenGL is a 2D/3D game based on the old arcade classic in which you must destroy enemy ships by shooting them up.

It is developed in OpenGL under Visual C++, and is still in development (alpha version).
It should run under Windows 98/ME/2000/XP with a 3D accelerator card and OpenGL drivers.

Open Source

Starport: Galactic Empires massively multiplayer action strategy game

The hit game Starport is now available and still 100% free to play. Be the captain of a space-ship in this fully graphical action game. Carve out a name for yourself in a multi-player world full of intrigue and strategy. Team up with other real people, or blast them out of the sky. Explore distant star systems, establish colonies on alien worlds, hunt for treasures, and try to become the most famous captain in all the galaxy!

OS: Windows

Stella - Atari 2600 Emulator

Stella is a multi-platform Atari 2600 VCS emulator released under the GNU General Public License (GPL). Stella was originally developed for Linux by Bradford W. Mott, however, since its original release several people have joined the development team to port Stella to other operating systems such as AcornOS, AmigaOS, DOS, FreeBSD, IRIX, Linux, OS/2, MacOS, Unix, and Windows. The development team is working hard to perfect the emulator and we hope you enjoy our effort.

OS: Win95 - Win XP, WinCE, Mac OS X, Linux

Super Star Trek

Super Star Trek is quite possibly the best of the "Star Trek" games from the 1970's. Of course, it does not make use of graphics, or even assume a video display, but it still an interesting game to play, particularly for those of us who don't have the reflexes we used to and prefer a more cerebral computer game.

Of course, Star Trek and it's characters are trademarks of Paramount Studios, Inc. And just like the original game, written by Star Trek fans who were also the, back then, rare breed of computer geek, isn't used with permission but with admiration of the show.

OS: Windows (console), Mac OS X, Linux
Note:  The page works but the download links don't.  I have copies and will be setting them up for download soon.
Open Source

The TA Spring Project- Total Annihalation clone

Spring is a project to create the best RTS ever (no joke). There are three principle goals which we hope to achieve.

   1. Reach a stage where TA Spring can flawlessly execute most of Total Annihilation's original gameplay, with its original units in their original format.
   2. Add new features as we see fit, fix bugs, and release new versions when we feel it is appropriate to do so.
   3. Support the mod community as we see fit.
   4. Improving the already fine original TA Interface in a way that the Players will have more tatctical Options, more Control, more Comfort and still don`t get lost, as long as they are willing to learn.

OS: Windows, Linux (Requires Total Annihalation still)
Open Source

TrueCombat:Elite

"TC:E is a modern world total conversion modification of the free, popular, stand-alone third-person shooter Wolfenstein: Enemy Territory. That is, TC:E is an entirely free game, made by gamers, for gamers.

TrueCombat:Elite (TC:E) is a realistic first person shooter set against the backdrop of modern urban warfare. The player can expect thrilling shootouts, an emphasis on tactical team play, engaging close quarter fighting and some of the best weapons of modern warfare.

Note: This game requires the earlier Wolfenstein: Enemy Territory to install.

OS: Windows

UFO: ALIEN INVASION - strategy game

UFO: ALIEN INVASION is a strategy game featuring tactical combat against hostile alien forces which are about to infiltrate earth at this very moment. You are in command of a small special unit which has been founded to face the alien strike force. To be successful on the long run, you will also have to have a research team study the aliens and their technologies in order to learn as much as possible about their technology, their goals and the aliens themselves.

OS: Windows, Linux
Note: Based on Quake 2 engine (modified)
Open Source?

VegaStrike - game
Vega Strike Mod - Privateer - Wing Commander Privateer clone

A 3D Space Simulator that allows you to trade and bounty hunt in a vast universe.

OS: Windows, Mac OS X, Linux
Open Source

WinUAE - Amiga Emulator

Windows port of the UAE Amiga Emulator

OS: Windows (DirectX 8+)

101 Free Games
OS: Win95 - Win XP   

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Miscellaneous

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Asterisk® - the Open Source PBX!

Asterisk

Asterisk is a complete PBX in software. It runs on Linux, BSD and MacOSX and provides all of the features you would expect from a PBX and more. Asterisk does voice over IP in many protocols, and can interoperate with almost all standards-based telephony equipment using relatively inexpensive hardware.
Features

Asterisk provides Voicemail services with Directory, Call Conferencing, Interactive Voice Response and Call Queuing. It has support for three-way calling, caller ID services, ADSI, SIP and H.323 (as both client and gateway). Check the Features section for a more complete list.

OS: Mac OS X, Linux, BSD Unix variants
Open Source

Celestia - The free space simulation

The free space simulation that lets you explore our universe in three dimensions. Celestia runs on Windows, Linux, and Mac OS X.

Unlike most planetarium software, Celestia doesn't confine you to the surface of the Earth. You can travel throughout the solar system, to any of over 100,000 stars, or even beyond the galaxy.

OS: Windows, Mac OS X, Linux
Open Source

Free Clipart

To use our free clip art, please save and upload them to your server space and
give us credit due for our work by linking back to "Free Gifs & Animations". Thank You.

Free-Clipart.Com

Welcome to Free-Clipart.Com!  Use these sources to enhance any Web site, presentation or printed material. Project a professional image with icons, lines, clip art, banners, borders, buttons, animations, bars and backgrounds. Browse, download and enjoy! Just be sure to use the images as the artists intended.

FreePBX Configuration tool for Asterisk (see above)

FreePBX is a standardized implementation of Asterisk is based around a web-based configuration interface and other tools.

Note: 2.1.2 has had some significant security vulnerabilities removed. All users of AMP or FreePBX are advised to update to 2.1.2 as soon as possible.

Open Source

GCompris - is an educational software suite (multi language)

GCompris is an educational software suite comprising of numerous activities for children aged 2 to 10. Some of the activities are game orientated, but nonetheless still educational. Below you can find a list of categories with some of the activities available in that category.

-  computer discovery: keyboard, mouse, different mouse gesture, ...
-  algebra: table memory, enumeration, double entry table, mirror image, ...
-  science: the canal lock, the water cycle, the submarine, electric simulation ...
-  geography: place the country on the map
-  games: chess, memory, connect 4, oware, sudoku ...
-  reading: reading practice
-  other: learn to tell time, puzzle of famous paintings, vector drawing, cartoon making, ...

Currently GCompris offers in excess of 100 activities and more are being developed. GCompris is free software, that means that you can adapt it to your own needs, improve it and, most importantly, share it with children everywhere.

OS: Windows, Linux, Linux Live CD
Open Source

Moodle - is a course management system

Moodle is a course management system (CMS) - a free, Open Source software package designed using sound pedagogical principles, to help educators create effective online learning communities. You can download and use it on any computer you have handy (including webhosts), yet it can scale from a single-teacher site to a 50,000-student University. This site itself is created using Moodle, so check out the Moodle Demonstration Courses or read the latest Moodle Buzz.

OS: Windows, Mac OS X
Open Source

GNU Octave - is mostly compatible with MATLAB

GNU Octave is a high-level language, primarily intended for numerical computations. It provides a convenient command line interface for solving linear and nonlinear problems numerically, and for performing other numerical experiments using a language that is mostly compatible with Matlab. It may also be used as a batch-oriented language.

Octave has extensive tools for solving common numerical linear algebra problems, finding the roots of nonlinear equations, integrating ordinary functions, manipulating polynomials, and integrating ordinary differential and differential-algebraic equations. It is easily extensible and customizable via user-defined functions written in Octave's own language, or using dynamically loaded modules written in C++, C, Fortran, or other languages.

OS: Windows, Mac OS X, Linux, OS/2
Open Source

OpenPBX.org

About the project:
OpenPBX.org is an open Source Private Branch Exchange System (PBX) in software for the Linux Operating system.  OpenPBX.org is licenesd under the GNU General Public License or GPL.

Goals:
The goal of the project is to produce a free Software PBX that will be highly robust and stable, featureful, and easy to use and deploy.  We will build a positive and forward-thinking community around OpenPBX.org to support it and carry it forward.

OS: Linux
Open Source

Plone - a content management framework

Plone is a content management framework that works hand-in-hand and sits on top of Zope, a widely-used Open Source web application server and development system. To use Plone, you don't need to learn anything about Zope; to develop new Plone content types, a small amount of Zope knowledge is helpful, and it is covered in the documentation.

Available in over 35 languages, Plone was designed from the ground up for multilingual content management. It handles Chinese, Japanese, and even right-to-left languages such as Arabic and Hebrew with ease.

OS: Windows, Mac OS X, Linux, BSD, Solaris
Open Source

World Wind - from NASA

World Wind lets you zoom from satellite altitude into any place on Earth. Leveraging Landsat satellite imagery and Shuttle Radar Topography Mission data, World Wind lets you experience Earth terrain in visually rich 3D, just as if you were really there.

Virtually visit any place in the world. Look across the Andes, into the Grand Canyon, over the Alps, or along the African Sahara.

OS: Win2000 - Win XP (.net required)
Open Source

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Networking

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Samba - Networking software

Samba is software that can be run on a platform other than Microsoft Windows, for example, UNIX, Linux, IBM System 390, OpenVMS, and other operating systems. Samba uses the TCP/IP protocol that is installed on the host server. When correctly configured, it allows that host to interact with a Microsoft Windows client or server as if it is a Windows file and print server.

OS: Windows, Mac OS X, Linux, OS/2
Open Source

Virtual Server 2005 - R2 Enterprise Edition for Free
OS: Windows XP

WinTC - Traffic Controller is an NT service program that controls outbound network bandwidth.
OS: Win NT

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Office Software

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AbiWord - Word Processor

AbiWord is a free word processing program similar to Microsoft® Word. It is suitable for a wide variety of word processing tasks.

OS: