Sign up for Skype, very easy to download and user friendly -
Free Skype internet calls and cheap calls to phones online - Skype
You will need a sign in name and once you have Skype activated and get your friends and familys sign in names, you'll be able to contact them. I think you can also get in touch thru Facebook.
I skype with my granddaughter every week and it's a fabulous way to keep in touch. You'll love it.