Out of all of the video chat services available online, Skype is by far the one that people are the most familiar with.  Unlike the Google Voice, which is powered through Gmail, Skype is a standalone program that you will have to download to your computer and install.  The process is quite easy, and Skype will show you step-by-step directions.  You can download Skype (for either Windows or Mac) here:

After you have installed the software and created an account and username, you’re ready to go!