Playlist Machinery - Tools that help you create & organize your Spotify playlists

Oto Music - Oto Music is an Android music player app that features Chromecast support, an equalizer, a ton of music controls, and functionalities.

Heartbeat - Listen to music with your friends together, on Spotify

Musicana Music Player - Musicana is a classical app for playing music on your Android that comes with features like a lyrics finder, five-band equalizer, fast song recognition & much more.

Partyhero - Pass your friends the aux!

3D Surround Music Player - 3D Surround Music Player allows you to listen to music with exceptional sound clarity and exclusive features such as dynamic bass boost, virtual3d surround effects, and treble boost.