A cool and very simple music player.

Mcool is yet another small and very easy to use application that is able to play the most common multimedia files including:
MP3, WAV, Flac, AudioCD, WavPack, APE, TAK, OFR, AAC, AC3, WMA, MPEG, AVI, etc.
Based on BASS library.
Mcool has a simple and comprehensive interface that will quickly guide you through all its features.

User's review from Softpedia:
"This player is amazing as it brings simplicity to the extreme having almost no interface but yet it is rather powerful as it provides support for almost any thinkable audio format (it can play the rarely used True Audio- TTA and even Cue sheets), while being truly portable makes it an ideal companion for any external flash drive for easy playing of almost any audio file (there's no support for only extremely uncommon lossless audio formats like Lossless Audio- LA, OptimFROG- OFR, Tom's lossless Audio Kompressor- TAK, and Shorten- SHN). It does not offer many options and customizations since it aims at being a 'bare bones' player entirely relying on a few hot keys (not extremely customizable). All it has to offer is some built-in colour themes (available at left-click just below the playlist, which feature is not documented in the Readme file), the simplest possible progress bar (no time elapsed/remaining), transparency, stay on top, equalizer and associations but its portability, stability and its huge number of supported formats make it a nice player for those, who (like me) enjoy minimalism.
-by smaragdus"