SoundNode - SoundCloud desktop app (OS X, Windows, Linux)
Music Pro - Stream YouTube music
BeardedSpice - BeardedSpice is a menubar application for Mac OSX that allows you to control web based media...
YouTube Music - YouTube Music is a streaming app primarily designed for Android and iOS mobile devices. The app lets individuals search for music from their favorite artists, enjoy playlists, and access 30 million musical tracks.
Atavi - Your bookmarks are always close at hand!
YT Music - An unofficial Mac app for YouTube Music