Android: SoundCloud is a great way to discover and listen to music, but the Android app doesn't stream directly to your Chromecast. My Cloud Player bridges that gap.
After installing My Cloud Player and logging into your SoundCloud account, you'll be able to access all your favourite music and playlists, just like the SoundCloud Android app. However, you'll also have a Chromecast icon that will stream the music directly to your Chromecast. While streaming, the TV will show the cover art from My Cloud Player. The app will also stream to XBMC if you don't have a Chromecast.
The app has both an ad-supported free version and a paid version free of ads.