The Chromecast is already a pretty cheap device, but what if you
don't have one handy? Developer Sebastian Mauer is working on an
emulator for Android called CheapCast. It would allow you to
treat any Android device like a Chromecast, and it looks to be
working just fine in his proof of concept video.  The video
shows a phone sending video to a tablet, but it could be any
device, even an Android HDMI stick.    1 2