RNOTunes is a GUI based audio player application with support for many different audio formats: MP3, FLAC, Ogg Vorbis, AAC, AIFF, WAV, Protracker, DigiBooster, SID, AHX, FastTracker II, ScreamTracker, OctaMED, The Player, NoisePacker, ProRunner, Oktalyzer, Impulse Tracker, Ultra Tracker, Ice Tracker, Liquid Tracker, Quadra Composer, and many other formats.