Xvid Codec
Xvid is an open-source research project focusing on video compression and is a collaborative development effort. All code is released under the terms of the GNU GPL license.
The Xvid video codec implements MPEG-4 Simple Profile and Advanced Simple Profile standards. It permits compressing and decompressing digital video in order to reduce the required bandwidth of video data for transmission over computer networks or efficient storage on CDs or DVDs. Due to its unrivalled quality Xvid has gained great popularity and is used in many other GPLed applications, like e.g. Transcode, MEncoder, MPlayer, Xine and many more.

7zip Compression Software
7zip is a free archive unitility and is used for unzipping compressed files. With 7 zip, you don’t need another zip utility because 7zip does it all. Download 7zip for free. 7zip Download is free to download.
The 7zip program supports 7z, ZIP, CAB, RAR, ARJ, LZH, CHM, GZIP, BZIP2, Z, TAR, CPIO, ISO, MSI, WIM, NSIS, RPM and DEB formats.

Open Office, The Free and Open Productivity Suite
OpenOffice.org 3 is the leading open-source office software suite for word processing, spreadsheets, presentations, graphics, databases and more. It is available in many languages and works on all common computers. It stores all your data in an international open standard format and can also read and write files from other common office software packages. It can be downloaded and used completely free of charge for any purpose.
Pidgin
Formerly known as Gaim, the Pidgin chat Client is one of the most popular piences of opensoource software around. It fully supports a plethora of chat networks including Yahoo, Windows Live Messenger, AIM, ICQ, Jabber, Gadu Gadu, IRC and more. Having all your friends in one place has never been easier. Pidgin supports all your standard chat features like file transfers, away messages, buddy icons and of course smilies.
Pidgin also has a large list of plugins that let you do everything from adding other messenging services like Facebook or Twitter to encrypting your chat logs to keep away prying eyes.
Audacity
Audacity is a free, open source software for recording and editing sounds. It is available for Mac OS X, Microsoft Windows, GNU/Linux, and other operating systems. Audacity is a free, easy-to-use audio editor and recorder. You can use Audacity to:
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