SoundCloud - Enjoy music & follow favourite artists
SoundNode - SoundCloud desktop app (OS X, Windows, Linux)
AutoBeat Player - Discover, share & play music from YouTube, SoundCloud, ..
BeardedSpice - BeardedSpice is a menubar application for Mac OSX that allows you to control web based media...
Headset - Personal music player for Youtube and Reddit
Atavi - Your bookmarks are always close at hand!