Foobar2000 is an advanced audio player for the Windows platform. Some of the basic features include ReplayGain support, low memory footprint and native support for several popular audio formats.

Features:

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.

What´s new in version 1.1.8:

Worked-around a reported security problem with certain WAV files and buggy system codecs.
Skip silence DSP improvements.
Improved MP3 tag handling (ID3v2) compliance:
More compliant WXXX parsing.
More compliant ID3v2.4 date handling.
Compressed 2.3 tags are now readable.
Due to heavy structural changes in relevant code, please watch out for MP3 tagging regressions.
Musepack decoding bug fixes. (beta 3)
Fixed a converter bug with writing multichapter files. (beta 3)
Improved FLAC/Vorbis metadata compatibility with other software. (beta 4, beta 5)
Affected fields: 'album artist', 'totaltracks', 'totaldiscs'.
The old behavior can be restored with an Advanced Preferences switch.
Support for playing WebM audio (beta 5)
Support for iTunes gapless information in MP3 files

Download the Stable version: foobar2000 v1.1.8

What´s New in version 1.1.9 Beta 2:

This update fixes more MP3 tagging regressions from 1.1.8 and refines the WAV tagging feature.