Last.fm - The world's largest online music service. Listen online, find out more about your favourite artists, and get music recommendations, only at Last.fm
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Maloja - Simple self-hosted music scrobble database to create personal listening statistics.
foobar2000 - An advanced freeware audio player for the Windows platform.
Pandora - Pandora Radio is a free (ad-supported) internet radio founded in 2000.
Winamp - Winamp is a media player that allows users to play multiple-file formats, arrange media in a varied file-management system, and play unique media with AAC encoding.