[Shahryar_NEO]

Mapping Tools

Nasa World Wind

Mapping tool similar to Google Earth for Windows. Must have the .NET Framework installed.
Download Page

Stars and Outer Space

Celestia

Open-source 3D planetarium software. Akin to traveling through space (outer space).
Download Page
Stellarium

"Renders realistic skys in realtime." See what you would see if your city wasn't so light-polluted. Used in real planetariums.
Download Page
Also see: macORSA - Orbit Reconstruction, Simulation, and Analysis

Open Source games !!! :

Games

Marathon: Aleph One

Engine for Bungie's free FPS series Marathon. Play online, solo play with rich original story, many total conversions and thousands of maps.
Download Page
Zombies

3D zombie strategy game.
Download Page
Armagetron Advanced

3D Tron game.
Download Page
BZFlag

First-person tank game.
Download Page
Battle for Wesnoth

Fantasy / Strategy Game
Download Page
Also see: Snes9X (SNES emulator), Frozen Bubble



Free File Hosting

CC Publisher

Host Creative Commons video or audio files for free on archive.org with this easy uploader.
Download Page

[Shahryar_NEO]

Security Tools

NMap

Easy to use port scanner for Windows
Download Page
Wireshark

Network Protocol Analyzer, formerly called Ethereal
Download Page
TrueCrypt

Creates encrypted virtual hard drives for extra security
Download Page
ClamWin

Open Source Anti-Virus. Very good at detecting viruses. Can be plugged into hMailServer for e-mail protection LIMITATION: Real Time scanning not implemented yet
Download Page
Eraser

Delete files securely off your hard drive utilizing DoD standards
Download Page
MP3 and Audio Tools

MP3 Gain

Easy to use MP3 manipulation tool for Windows. adjusts sound levels on MP3's so they are all the same
Download Page
MP3 Book Helper

This program provides rapid Mp3 (ID3v1, ID3v2) and Ogg/Speex/Flac Vorbis tags editing and file renaming functions. Mass Tag editing is done using special variables and Regular Expressions.
Download Page
musikCube

Open Source MP3 Player, ripper and organizer written using the .NET Framework
Download Page
Utilities

Cobian Backup

Backup software.
Download Page
7-Zip

File archiver.
Download Page
Developer tools

XEmacs

The classic, super customizable editor, for Windows.
Download Page
KompoZer

Easy to use, open source WYSIWYG html editor
Download Page
SharpDevelop

Open Source IDE for the .NET Framework. Utilizes the multiple programming languages and Windows forms
Download Page
Notepad ++

Open Source programmers notepad for Windows
Download Page
SciTE

Source code Editor for Windows and X
Download Page Web Developer Server Suite

Very good WAMP Stack (Windows, Apache, MySQL, PHP) Very thouroughly tested on Windows Server 2003 and Windows 2000 Server (preliminary testing on Longhorn Server underway). Highly Recommended.
Download Page

3D Graphics and Modeling

Blender

Powerful 3D Modeling software.
Download Page
Also see: Kerkythea (illumination engine) - Persistence of Vision Raytracer - Quesa