klaep - music collaboration - klaep is a social music collaboration network for musicians

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

Pyro - Spotify music voting for parties

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.

Playlistful - Collaborative playlists for parties!

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.