Flac DirectShow Filter
CoreFlac Directshow Flac Decoder. I store my digital music in FLAC format. This is an open source lossless format. Winamp can play this back, but these folks have written a Directshow filter so anything that uses Directshow like Windows Media Player can now play it back.
Other projects by “Corecodec”:http://corecodec.org include a Directshow ogg vorbis filter that lets Windows Media play that format back as well.
“Vorbis”:http://www.vorbis.com/ also has a directshow filter that lets Windows Media player play back Ogg Vorbis, Flac, Speex which is probalby a better choice.