Joining the growing family of iTunes plug-ins, The Filter is a free program that works like your own personal DJ by automatically creating playlists from your library and syncing them to your iPod. Selecting just a few songs directs the program to analyze your picks, scan your library and generate a mood-matching mix. The time-saver will even compile data on your musical tastes to recommend new music it thinks you might like.
Available for Mac, Windows and select Nokia mp3-enabled phones as a free download.
Via Cool Hunting