Designed to ape Google's dongle, it basically gives phones and tablets the ability to stream from Chromcast-friendly apps to another device on the same WiFi network. So, if you have an old tablet, say, with HDMI out, you can hook it up to your TV and—boom—you kind of have Chromecast.
Cheapcast is available on Google Play, but it's worth noting that it doesn't really work with the Chrome browser and, uh, it may still be a little buggy. But hey, nothing ventured, nothing gained. [Cheapcast via AndroidCommunity via Engadget]