I use Skype a lot. My family is in England and we use it with a webcam to chat often. I have also found it useful for client chats as I can put a headphone on and type with both hands. I find it impossible to type with one hand!
Skype is a free program that goes computer to computer. All you need is a microphone and in a lot of computers, they are built in. If you would like to contact me via Skype, please email for my user name as I have it restricted to only people on my contact list. It’s very easy to use and the quality is often better than a cell phone.