Vorbital is an Ogg Vorbis music player. It uses OpenAL and is small and compact in order to take up as little screen space as possible (though you can, of course, resize the window if you would like a larger playlist).
Ogg Vorbis is a free music codec that is unencumbered by patents and can be freely used by everyone. Audio encoded with Vorbis is usually slightly higher quality than an MP3 recorded at the same bitrate.
Vorbital supports playback of Ogg Vorbis, .WAV, Wavpack, AIFF, and SND format audio files.
OpenAL (included in install)