Tango Video Calls App
Tango looks like Apple FaceTime, but there are a few key differences. Tango allows you to place a video call over 3G networks, while FaceTime only works on WiFi networks. As a result, the video quality is nowhere near what one can expect with FaceTime, but hey, 3G video calling is pretty compelling. The other attractive feature is the cross-platform nature of the solution. Tango also has an Android client which means a larger network of video-call capable friends and colleagues.