Atraci is an application for Windows, Mac and Linux that lets you listen instantly to more than 60 million songs (way more than iTunes's 26 million). It requires no sign up, displays no ads and is 100% safe.
How does it work?
When searching, the app will use iTunes, Last.fm and SoundCloud to display song results (with cover, title, artist). It will then try to find the best match for this song on Youtube and stream the highest quality video stream.
No downloads, No torrents, completely decentralized and Legal!
https://github.com/Atraci/Atraci 
