Meet the pieces of free software working together to build a complete free software system.

There are thousands of pieces of free software, many of which are listed in our directory of free software, but of these projects, a few dozen are extremely common — we call these the free software gang.

• Amarok — listen to CDs, downloaded music, streaming radio and podcasts
• VLC — watch DVDs, videos from YouTube and other downloads

Office and database

• OpenOffice.org — word processing, spreadsheets and presentations
• MySQL — a full-fledged database that works with OpenOffice.org

Web and email

• Drupal — run your website in style
• Firefox and GNU IceCat — browse the web at high-speed and in safety
• Thunderbird — send email like a pro!
• Mozilla — the all-in-one browser, email and web-editing software

Graphics

• Blender — make 3d animations and edit video
• GIMP — touch up and crop photos from your digital camera and the web
• Inkscape — make flyers, postcards and printed materials

Programming

• PHP programming language — the language that powers Wikipedia and the White House website
• Java — used in everything from your cellphone to your bank
• Perl language — the system administrator's swiss army knife
• Python language — popular with Google and NASA, also runs this website!
• Ruby language — used by many of the Web 2.0 websites

Operating system and friends

• GNOME — the graphical desktop for many of the GNU/Linux systems, including Trisquel
• GNU — the fully free operating system
• FreeBSD — another operating system, often used by power-users
• Gecko — the same powerful code that powers Firefox and Icecat, in your own software
• KDE — another popular graphical desktop, favored by many for its powerful features
• Linux — together with GNU, Linux powers the GNU/Linux operating system
• Nautilus — the GNOME file manager
• OpenSSL — keeps your private information secure online...

via FSF