Top Android VoIPs

I need some recommendations for a VoIP that is capatible with the Galaxy S3. I am looking more for a Video over IP like skype, rather than voice over IP. Sorry if I used the wrong termanology when asking for a VoIP that sends video. Also how well does Skype perform in the real world on the Galaxy S3? 

*ping*

I been using "Groove IP Free" app with Google Voice, haven't paid a cell phone bill for 2 years.  Only catch is need WiFi haha.

I've been using talkatone. It's an alright app