I'm new to ComputerHope, go easy. i compiled a list of freeware/open source freeware/freeware alternatives to payware. Feel free to add suggestions to the list. it's far from perfect, and I know I missed a lot
Best Freeware and Open Source applications
by ThomasTheXPUser
Internet
Browser : Mozilla Firefox
Browser Honorable Mention : K-Meleon, Opera
FTP : WinSCP, Encrypted FTP, FileZilla
FTP Honorable Mention : FireFTP Firefox Add-on
Media
Audio Player : VLC
Audio Player Honorable Mention : Media Player Classic
Songbird
Video Player : VLC
Video Player Honorable Mention : Media Player Classic
WinAmp
Audio Editor/Recorder : Audacity
Codec Pack : K-Lite Codec Pack
DVD Creator (DVD's playable in DVD Players) : DVD Flick
Video Editor : VirtualDub
Burner : CDBurnerXP
Graphics
Image Editor : GIMP
Image Editor Honorable Mention : Picasa
Image Viewer : Picasa
Image Creator : GIMP
Image Creator Honorable Mention : Inkscape
Paint.NET
System Utilities
System Cleaner : Ccleaner
Anti-Virus : AVG
Other Malware removers :
Malware bytes
Super Anti Spyware
SpyBot Search and Destroy
Office
Openoffice.org
IBM Lotus Symphony