This Saturday the open source initiative will be 10 years old.  I’m a huge open source fan, in fact my blog is being written and hosted on open source software.  10 years past and many more years to come for this popular movement.  Some of the best applications are open source.  Have a look at this list, your probably using some of these right now:

• Mozilla Firefox
• Mozilla Thunderbird
• Linux
• Ubuntu
• Gimp
• Blender
• Miro
• VLC
• HandBrake
• Songbird
• Audacity
• Open Office
• WordPress (this blog is written on wordpress)
• Drupal
• Moodle
• Azureus
• Pidgin
• Filezilla
• PHP (this blog is written in php)
• Apache (this blog is hosted on an apache server)
• Google Code
• Google Pack
• TrueCrypt

And this list doesn’t even scratch the surface.  Take a look at Open Source Living for more great Open Source applications.