Free Public Domain classical music repository, that also provides streaming, sheet music and collaboratively writing a public domain music theory text book, it also permits submitting music to the collection.
free music-recognition robot/service. It allows you to identify unknown piece of music (pieces of 15-45 seconds audio), in almost any file format and with any bit-rate. Uncompressed, ADPCM and other waves (.WAV), MPEG-1 Layer III (.MP3), Ogg Vorbis (.OGG), FLAC, Flash Video (.FLV), .AMR, .MP4, and more. Only modern popular music, old jazz and classics as also some Russian music.