Ubuntu, an operating system based on Debian GNU/Linux. Ubuntu is an open-source alternative to Windows and Office.
The new release, Ubuntu 10.04 (Lucid Lynx) includes,  among other things, the Linux kernel 2.6.32, GNOME 2.30, Mozilla Firefox 3.6, Mozilla Thunderbird 3.0, OpenOffice.org 3.2 and improved support for Nvidia proprietary graphics drivers, while switching to the open source Nvidia graphics driver, nouveau, by default.
GIMP was removed from the Lucid installation CD due to its professional-grade complexity and its file size. F-Spot provides normal user level graphics editing capabilities and GIMP remains available for download in the repositories.
The distribution emphasises the new importance of web services and social networking with integrated interfaces for posting to sites like Facebook and Twitter, complementing the IM and email integration already in Ubuntu.