A MediaRenderer is in UPnP speak a device that plays back media content provided by a MediaServer. It is intended to be controlled by an UPnP ControlPoint.

Furthermore it is the name of a little project that acts as a test-bed for the Coherence client implementations.

Coherence has these MediaRenderer backends:

GStreamer player
Based on GStreamer this backend forms a stand-alone MediaRenderer for audio (and video) files.
Rhythmbox
A MediaRenderer embedded in Rhythmbox, allowing to control the player there with an UPnP ControlPoint.
Elisa
That MediaRenderer allows the Elisa Media Center to be controlled by an ControlPoint.