Emit - Emit can stream from a Windows/Mac/Linux machine to an android/iOS device.
MusicZen - mp3 file organizer
MoboPlayer - MoboPlayer is a video player for Android that plays most video formats.
Harmony Music Player - Music player with sleek interface & cloud compatibility
Vinyl Music Player - A fork of Phonograph Music Player that "makes all Pro features free, as they used to be".
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.