Open Source Software For Windows

Here are some open source for windows

Utilities

7-Zip
7-Zip is a file archiver with a high compression ratio.
7-Zip is open source software. Most of the source code is under the GNU LGPL
license. The AES code is under a BSD LICENSE. The unRAR code is under a mixed
license: GNU LGPL + unRAR restrictions.
You can use 7-Zip on any computer, including a computer in a commercial
organization. You don't need to register or pay for 7-Zip. But you can make a
donation to support further development of 7-Zip.

The main features of 7-Zip
* High compression ratio in new 7z format with LZMA compression
* Supported formats:
o Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR
o Unpacking only: RAR, CAB, ISO, ARJ, LZH, CHM, Z, CPIO, RPM, DEB and NSIS
* For ZIP and GZIP formats, 7-Zip provides a compression ratio that is 2-10 % better than the ratio provided by PKZip and WinZip
* Self-extracting capability for 7z format
* Integration with Windows Shell
* Powerful File Manager
* Powerful command line version
* Plugin for FAR Manager
* Localizations for 63 languages

Cobian Backup
Cobian Backup is now Open Source. I'm sure this is a bad decision and this eventually will mean the end of the program as we know it (Open Source is not the Holy Grail, you know?), but I have no longer the time (nor the desire) to keep developing the program year after year. So now you can download the program in binary or source form from SourceForge. The code is licensed under the Mozilla Public License 1.1 . If you are a developer, you can download the code and use it, but if yu care for the program and want to take part in the program's development, drop me a line and I'll add you to the team. You must use SVN then to work with the main depository. I will be participating in the project the first months, and then I will eventually take a break when (and IF) I find a good developing team.

ClamWin
ClamWin is a Free Antivirus for Microsoft Windows 98/Me/2000/XP and 2003.
ClamWin Free Antivirus comes with an easy installer and open source code. You may download and use it absolutely free of charge. It features:

* High detection rates for viruses and spyware;
* Scanning Scheduler;
* Automatic downloads of regularly updated Virus Database.
* Standalone virus scanner and right-click menu integration to Microsoft Windows Explorer;
* Addin to Microsoft Outlook to remove virus-infected attachments automatically.

The latest version of Clamwin Free Antivirus is 0.91.1

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

VLC
Plays more video files than most players: Quicktime, AVI, DIVX, OGG, and more. Pretty good interface.


OpenOffice.org
Big, full featured suite of tools for word processing and spreadsheets. Compatible with and a free replacement for Microsoft Word documents. Also supports OpenDocument Format.

AbiWord
A word processor. Leaner and quicker than OpenOffice. Compatible with Microsoft Word documents and OpenDocument Format.