Thirteen Open Source programs you should check out:
  1. GAIM - Multi-protocol Instant Messenger
  2. Mozilla Firefox - Web Browser
  3. Mozilla Thunderbird - Email Client
  4. ZSNES - Super Nintendo Emulator
  5. Filezilla and Cyberduck - S/FTP Client
  6. VLC - Media Player
  7. Apollon (GNU/Linux Only)- Multi-protocol File Sharing
  8. Grease Monkey - Firefox Extension
  9. TightVNC and Chicken of the VNC - Remote Desktop
  10. OpenOffice.org - Office Suite
  11. 7zip - File de/compression
  12. Nethack - Dynamic Text-mode Dungeon Crawler
  13. ClamAV - Anti-Virus Detection and Removal