01 The GNU Image Manipulation Program, or GIMP, is a raster graphics editor used to process digital graphics and photographs. Typical uses include creating graphics and logos, resizing and cropping photos, altering colors, combining multiple images, removing unwanted image features, and converting between different image formats. GIMP can also be used to create basic animated images in GIF format. It is often used as a free software replacement for Adobe Photoshop, the most widely used image editor in the printing and graphics industries. GIMP works on many operating systems, in many languages and it is a vital application when you deal with images everyday.

02 MPlayer is a free and open source media player distributed under the GNU General Public License. MPlayer is the best video player Linux has ever had. MPlayer is available for all major operating systems, including Linux and other Unix-like systems, Microsoft Windows and Mac OS X. Versions for OS/2, AmigaOS and MorphOS are also available. MPlayer supports a wide variety of media formats. In addition to its wide range of supported formats MPlayer can also save all streamed content to a file.

03 Amarok (pronounced "am a rock") is a free software music player for Linux and other varieties of Unix. It has an intuitive interface and makes playing the music you love easier than ever before. Amarok is being able to compete with iTunes and other popular music player applications.

04 Pidgin (formerly named Gaim) is a multi-platform instant messaging client that supports many commonly used instant messaging protocols. Pidgin is free software available under the GNU General Public License. Pidgin allows you to use all of your IM accounts at once (AIM, IRC, Yahoo, Google Talk, MSN, QQ, ICQ, SILC, Jabber, etc.)

05 OpenOffice.org is an office suite application available for a number of different computer operating systems. It supports the OpenDocument standard for data interchange as its default file formats, as well as Microsoft Office ’97-2003 formats, among many others. It is a multilanguage office suite that will run on all major platforms. It best known to be compatible with all other major office suites.

06 Wine is the open source implementation of the Windows API on top of X, OpenGL, and Unix, proved to be the most strong, powerful and easy to use software to run Windows applications. With Wine, you can run a lot of Windows programs on Unix-based operating systems.

07 K3b (from KDE Burn Baby Burn) is a CD and DVD authoring application for the KDE desktop for Unix-like computer operating systems. It provides a graphical user interface to perform most CD/DVD burning tasks like creating an Audio CD from a set of audio files or copying a CD/DVD, as well as more advanced tasks such as burning eMoviX CD/DVDs. It can also perform direct disc-to-disc copies. The program has many default settings which can be customized by more experienced users. It can deal with any CD/DVD format that exists today. It also can create Audio CDs, Video CDs, eMovix CDs, rip DVDs and encode DivX/XviD video files.

08 The award-winning web browser is faster, secure, and fully customizable. Firefox had 16.01% of the recorded market share in Web browsers as of November 2007, making it the second-most-popular browser in current use worldwide. Firefox includes tabbed browsing, a spell checker, incremental find, live bookmarking, a download manager, and a search system that includes Google. Firefox runs on various versions of Microsoft Windows, Mac OS X and Linux.

09 Mozilla Thunderbird is a free, open source, cross-platform e-mail and news client and newsgroup client that makes emailing safer, faster and easier than ever before. It offers some advantages over other mail clients, including junk mail classification. It sure is one of the best E-mail/RSS open source and multiplatform applications.

10 FileZilla Client is a free, open source, cross-platform FTP client with lots of useful features and an intuitive interface. It is very easy to use, supports transfer of files over 4GB and has filename filters.