Foobar
Supported audio formats: MP3, MP4, AAC, CD Audio, WMA, Vorbis, FLAC, WavPack, WAV, AIFF, Musepack, Speex, AU, SND... and more with additional components.Gapless playback.Full unicode support.Easily customizable user interface layout.Advanced tagging capabilities.Support for ripping Audio CDs as well as transcoding all supported audio formats using the Converter component.Full ReplayGain support.Customizable keyboard shortcuts.

Open component architecture allowing third-party developers to extend functionality of the player.