Music Player for Reddit - Play music from subreddits
MixTape - Home of MixTape, an OSX application for creating beat matched mixes with simple export to the web or iTunes.
Museeks - A simple, clean and cross-platform music player
Song Director - Song Director is a program that plays and keeps track of all your music files.
Jukebox - Collaborative music player
ServeStream - ServeStream is an open-source application that is intended for HTTP media player streaming, and the media server browser comes with the alluring support for custom online radio and Shoutcast streams.