VLC Media Player
Open Source
A free and opensource very popular media player. VLC Media Player supports a wide variety of media formats and known for its stability.
Madsonic
Open Source
Madsonic is a web-based media library and media streamer with jukebox functionality.
Napster
Commercial
Napster is a peer-to-peer (P2P) file sharing Internet service that emphasized sharing digital audio files, typically songs, encoded in MP3 format.
Compare Amarok with alternatives
Compare VLC Media Player and Amarok and decide which is most suitable for you.