After the Success of MiniPlayer for iOS I decided to make the OSX version. MiniPlayer let you control and search your Music with all the most popular Apps. It supports iTunes,Spotify, Rdio, [Dezeer plugin beta] and is extensible to any other App you like(see Plugin).
Three Themes are available : Dynamic, Black and White.
You will love to listen your Music thanks to the simple and beatiful UI made by @Surenix
Why is not in the Mac App Store?
I decided to give Developers the opportunity to make plugin, due to the limitation of the sandbox I have to avoid the MAS. If I see that nobody will use/build external plugin I can try to submit in future (is not sure that is accepted because I need some sandbox exceptions)
You can use the built-in PlugIns (Spotify, iTunes,Rdio) in the Menu Music Services (Status Bar)
You can make your own PlugIn, look my example https://github.com/MP0w/MiniPlayer-Plug-In , all you have to do is a bundle with the extension .miniplayerplugin and the Principal Class that conform to the MPMiniPlayerPlugin protocol
Your PlugIn can be listed here or included in MiniPlayer if you wish, just contact me at email@example.com