This is the receiver app, which can be installed on various devices, including Amazon Fire TV and Amazon Fire
It allows you to stream all media from your Kindle or Android device.
You need to install LocalCast from the Amazon App Store to use this: http://www.amazon.com/gp/mas/dl/android?p=de.stefanpledl.localcast
In the LocalCast app, turn on the device discovery:
Touch the cast icon and enable the discovery for "SmartTVs, Xboxes, Sonos, etc." devices.