You can also find this list on my main blog - Vista compatible freeware - which is updated very often.

Audio and Video and Image

• FastStone Capture (freeware version) - Screenshot capture
• FastStone Image Viewer
• Picasa
• ImgConverter
• Firm Tools Shell Extension Converter
• Image ReSizer
• The GIMP
• Blender 2.44
• Paint.NET
• Corel Snipefire 1.2 - Image organizer, editor and viewer
• Acala Video MP3 Ripper

• Mega Sound Recorder - Sound recording
• EXPStudio Audio Editor Free - Audio editor
• Audacity
• GOM Player
• OrangeCD Player
• Ashampoo Clip Finder
• FinalBurner - Burning tool
• ImgBurn Burning tool

• DVDFlick
• Dvd Decrypter 3.5
• Dvd Shrink 3.2

  more…

Best Free Firewall

• ZoneAlarm free (firewall)*****
• Comodo Personal Firewall
• Ashampoo Firewall free
  
• Sunbelt Kerio (firewall)(after 30 days becomes freeware)
• Outpost Firewall (firewall)
• SoftPerfect Personal Firewall
• Jetico Firewall