Musicbug project is a DAAP client into an embedded system (the AcmeSystems FOX board) that permits listening to music shared with iTunes or mt-daap server in your local network .
UPnP-Music-Server. It serves a sqlite-database of your mp3 music collection to a upnp-client. I tested it with Noxon from Terratec. Written in Python. I no longer work on this project since I do not have access to the hardware any more.
A server based music (ogg/mp3/flac) player. Written in Python/C, uses sqlite for a database backend, and xml-rpc for client/server communication. Released clients are for php, sdl and curses(geezer).