OpenTokRTC is a demonstration of a multiparty WebRTC based video chat service. It has client applications for Android and iOS, as well as a web based experience at https://opentokrtc.com.
The application is built using the OpenTok platform, built by TokBox (http://www.tokbox.com).
If you are a developer and want to learn more, visit http://tokbox.com/opentok to get started. The source code for this application is available at https://github.com/opentok/OpenTokRTC-Android.