TheFilter.com - Instant Playlist Generator for iTunes

The Filter is a free plugin for your iTunes. It creates playlists for you automatically based on a couple of songs you select from your library. The playlists are based on songs that generally fit into a similar mood as the ones you selected. It´ll even automatically update your playlists each time you plug in your iPod, creating a fresh playlist each time, depending on what you need it for. With the Filter, you´ll be able to listen to and find all of those lost songs on your playlist you have forgotten about or never have the time to search through.

“The Filter is a free tool for Windows, Mac and Nokia that uses your music to create interesting playlists, automatically fill and refresh your iPod or MP3 player and discover new music.

Plug-ins for iTunes are popular because practically everyone owns an iPod now, so everyone uses iTunes. Playlists are a pain to create, so a tool that does that automatically is great. The iPod shuffle is pretty big right now, so clearly people like listening to a random mix of their music, and this makes all of the music in that mix related.

Where are they gaining a profit from? Apple? Will people want to download one more thing to their computer when iTunes and all the music take up a lot of space on the hard drive?