Free and open-source software is good for you and good for the world. This is the best Mac software that we know of.
Peer-to-Peer Filesharing
Azureus
A powerful, but complicated BitTorrent client. So many features you'll lose your mind.Download Page
Graphics / Photo Editing
IRC
Note Taking
Personal Finance
Chat Clients
More Web Browsing
Security Tools
ClamWin
Open Source Anti-Virus. Very good at detecting viruses. Can be plugged into hMailServer for e-mail protection LIMITATION: Real Time scanning not implemented yetDownload Page
MP3 and Audio Tools
MP3 Gain
Easy to use MP3 manipulation tool for Windows. adjusts sound levels on MP3's so they are all the sameDownload Page
MP3 Book Helper
This program provides rapid Mp3 (ID3v1, ID3v2) and Ogg/Speex/Flac Vorbis tags editing and file renaming functions. Mass Tag editing is done using special variables and Regular Expressions.Download Page
musikCube
Open Source MP3 Player, ripper and organizer written using the .NET FrameworkDownload Page
Utilities
Developer tools
SharpDevelop
Open Source IDE for the .NET Framework. Utilizes the multiple programming languages and Windows formsDownload Page
Mapping Tools
Nasa World Wind
Mapping tool similar to Google Earth for Windows. Must have the .NET Framework installed.Download Page
Other software: DVD to MP4, iPod Video Converter Software Download