Online media information catalog
Cool Open GL 3D visualization plug in for iTunes which renders your favorite music!
Real-time music visualization plug-in for media players.
An iTunes plug-in that displays image files for each song.
iTunes visualizer plug-in for your Mac OS X
Fountain Music – iTunes visual plug-in which animates particles to the beat of the music
VirbTunes tracks your song plays and sends the data to Virb.com
Archos Plug-in for iTunes 6 will allow you to create playlists from Apple’s iTunes application for all Archos MP3 players