It's like Skype 
 http://www.oovoo.com/home.aspx

 
ooVoo Video Features

• Up to 6 participants in a call


• Import your contacts from IM, social network, email and more


• Record and send video messages


• Change your view to Full Screen mode


• Record and store audio and video calls


• Text chat and share files

Devices it works on are here:

 http://www.oovoo.com/Mobile.aspx?pname=MobileDevices