Kodi - Kodi is an award winning free and open source media player that got its start on the Xbox console.
Emit - Emit can stream from a Windows/Mac/Linux machine to an android/iOS device.
Emby - media server for personal streaming movies tv music photos in mobile app or browser for all devices android iOS windows phone appletv androidtv smarttv and dlna.
MoboPlayer - MoboPlayer is a video player for Android that plays most video formats.
OSMC - OSMC is a free and open source media center built for the people, by the people.
Vinyl Music Player - A fork of Phonograph Music Player that "makes all Pro features free, as they used to be".