foobar2000 is an advanced freeware audio player for the Windows platform. Some of the basic features include full unicode support, ReplayGain support and native support for several popular audio formats.
foobar2000 v0.9.6.5 beta 1 has been released, with more bugs fixed based on crash report submissions as well as new troubleshooter feature accessible from the help menu.
0.9.6.5 beta 1
Product page: here