Foobar2000 is an advanced 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.
Media Library now automatically keeps track of any changes made to
its folders; no more need to manually rescan them.
Improved compatibility of file type associations with Windows Vista.
No more delay when playing/enqueuing files from Windows Explorer.
The installer now includes “portable mode” that works in limited
user contexts and doesn't make any changes to system configuration,
New Converter user interface.
Built-in Matroska support.
0.9.6 beta 1
Product page: here