foobar2000 is an advanced freeware audio player for the Windows platform.

Main features:

* Supported audio formats include: MP3, MP4/M4A, CD Audio, WMA, Vorbis, Opus, FLAC, WavPack, WAV, AIFF, Musepack.

* Gapless playback.

* Advanced tagging capabilities.

* ReplayGain support.

* Customizable keyboard shortcuts.