A free open source audio player for OS X (10.4 and above). Currently it supports the following formats: Musepack, AAC, Ogg Vorbis, MP3, FLAC, Monkey's Audio, Shorten, Wavpack, WAV, and AIFF.
Features: gapless playback, smart shuffle, tagging (APE 1.0/2.0, Vorbis comments/FLAC tags, ID3 1.0/1.1/2.3+), seeking.