Previously known as "whyd" (whyd.com), now open-source and maintained by its community of music lovers.
Pro Can play rare/exclusive tracks that are available through one platform only
Openwhyd can play tracks directly from Youtube, Soundcloud, Deezer, Bandcamp, Dailymotion, Jamendo, and also MP3 files and streams hosted online.
Some of those tracks cannot reliably be found on other platforms. Examples: songs from that local/indie band, DJ sets, specific live performances.