Here's the hardest part about traveling or living in another part of the world — being away from friends and family. In the old days, this would have meant paying outrageous long distance prices, racking up a ridiculous bill for every passing minute. With Rebtel, those days are over. Here's how it works: users download the app and choose to pay as they go or get a cheap rate for a monthly plan (for example, unlimited calls to India is just $10 a month). The calls are crystal clear and the first call is free, so there's no commitment to sign up.