Use CheapCast to turn your Android tablet into a Chromecast
... Google Play (with more content providers to come). The free CheapCast app (not made by Google) enables nearly any Android device to function as a Chromecast, effectively playing the role of the TV as you stream media from your other Android device.
Upcoming CyanogenMod will open up Chromecast streaming to more Android ...
Cheapcast app turns your Android device into a Chromecast (video)
Free 'CheapCast' Android App Mimics Google Chromecast