Given that megastar internet search engine Google became its own verb a few years ago, we've all come to acknowledge that the wide and ever-expanding engine is becoming more powerful than ever before. You can take a look at your own house from outer space via Google Earth, you can look at famous paintings - down to the very last grizzly brushstroke - via Google Art Project, and you can look at what's hot and what's not in Spain - or anywhere in the world - with Google Trends.
More » on Apple's operating system and devices, and only with other Facetime users.
So long as both people use the oo Voo app, they can make video calls as often as they like.
More » If you have a Windows computer, Viber might be the perfect free video calling app for you.
It's as easy to use as selecting a contact from the "Viber Only" section of your contact list and then using the video button to start the call.
Viber lets you turn the video off whenever you like, mute the call, or even transfer the call.