Subsonic (media server)

Subsonic is an open source, web-based media server. It is written in Java, so it can run on any operating system with Java support. Subsonic supports streaming to multiple clients simultaneously, and supports any streamable media (including MP3, AAC, and Ogg). Subsonic also supports on-the-fly media conversion (through the use of plugins) of most popular media formats, including WMA, FLAC, and more.