Kodi - Kodi is an award winning free and open source media player that got its start on the Xbox console.
The Vamp - Transform any speaker into a portable Bluetooth® speaker
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.
Sonos Out Door Speaker - An outdoor speaker developed by Sonos and Sonance
Universal Media Server - Universal Media Server allows you to host your entire library of video, music, and pictures, and broadcast them conveniently to a wide variety of different devices.
BOSEbuild Speaker Cube - Build-it-yourself Bluetooth speaker for curious kids