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
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.
Features of Skype
ooVoo ooVoo is an instant messaging client which developed by ooVoo LLC. Calls can be recorded and video chatting with six users is supported.
Features of ooVoo
Record and send video messages
Up to 6 participants in a call
Record and store audio and video calls
Text chat and share files
Let`s compare with each other;
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.