SoundNode - SoundCloud desktop app (OS X, Windows, Linux)
Listen2MyRadio - Stop dreaming, start streaming. Free and premium Shoutcast and Icecast audio broadcasting.
Cumulus - A SoundCloud player that lives in your menubar.
Streampusher - Start your own internet radio station
Sleeve - Your currently playing track displayed right on your desktop
Live365 - 5,000+ online radio stations run by real people, not generated by computers.