Select a tag to browse associated projects and drill deeper into the tag cloud.
Rockbox is an open source replacement firmware for portable music players. It runs on a wide range of different models.
Quod Libet is a PyGTK audio player that supports many ways to search your library. It lets you make playlists based on regular expressions, and you can add any tags you want to your audio files.
Jajuk is software that organizes and plays music. It is a fully-featured application geared towards advanced users with large or scattered music collections.