Ubuntu Linux is a community driven project to create an operating system and a full set of applications using free and open source software.

At the core of the Ubuntu Philosophy of Software Freedom are these core philosophical ideals:
+ Every computer user should have the freedom to run, copy, distribute, study, share, change and improve their software for any purpose, without paying licencing fees.
+ Every computer user should be able to use their software in the language of their choice.
+ Every computer user should be given every opportunity to use software, even if they work under a disability.

http://UbuntuLinux.tribe.net