Muine is a music player for GNOME using Mono. It features:

* A simple, intuitive user interface
* Ogg Vorbis, FLAC and MP3 music playback support
* Automatic album-cover fetching
* Support for embedded ID3v2 album images
* ReplayGain support
* Support for multiple artist and performer tags per song
* A system tray icon
* Translations into many languages

WWW: http://muine-player.org