3. In order to download; Skype http://www.skype.com/intl/en-us/get-skype/on-your-computer/windows Oovoo http://www.oovoo.com/Download.aspx
4. Skype Skype is a software application which allows users to make voice calls over the Internet. It is totally free to call other users within the Skype service.
13. Recommendation I recommend to use Skype, Skype is more comfortable, and higher quality than ooVoo video call. A price of Skype is cheaper than ooVoo. I like to use emotions while talking, and Skype gets them.