Rebtel is a great service that offers low rates on international phone calls. You just fill out a form telling them who you want to call, then they give you a local number to dial and Whamo! Your talking to family and friends around the world for a tenth of what you could pay.   Theres nothing to download, the calls dont involve your computer, and theres no calling cards.

You can even make  mobile to mobile international phone calls absolutely free!

Sign up here!