Discover on Demand - Just like Spotify's Discover Weekly, but whenever you want.
Listen2MyRadio - Stop dreaming, start streaming. Free and premium Shoutcast and Icecast audio broadcasting.
Rocketgraph - Rocketgraph is an open-source drop in replacement to Firebase, except it's much better.
Wohooo.net - Create Your Own Online Radio Station
Spotify - Map shows when two people play same song at same time
Streampusher - Start your own internet radio station