My selected: Open Source Software / Free Software

Windows

• Mozilla Firefox
  
• Mozilla Thunderbird
  
• ChatZilla
  
• DownThemAll
  
• OpenOffice.org
  
• 7-zip
  
• cvs
  
• Dia
  
• Filezilla
  
• FreeMind
  
• Gimp
  
• IrfanView
  
• KDiff3
  
• md5deep
  
• Notepad++
  
• Pidgin
  
• PSPad editor
  
• PuTTY
  
• WinCVS
  
• WinMerge
  
• WinSCP
  
• Free:

• AVG
  
• ZoneAlarm
  
• Ad-Aware SE Personal
  
• Rainlendar2
  
• Xmanager
  

Linux

• Mozilla Firefox
  
• Mozilla Thunderbird
  
• 7-zip
  
• aria2
  
• ChatZilla
  
• DownThemAll
  
• Gimp
  
• KDiff3
  
• OpenOffice.org
  
• Pidgin
  
• X-Chat
  
• Zim
  

Why Open Source Software / Free Software (OSS/FS, FLOSS, or FOSS)? Look at the Numbers!