TextNow

TextNow is an app for making calls and sending texts to anywhere in the world. And all you have to do is punch in a few numbers. But first, of course, you'll need to verify your phone number. That's it.

Once you've completed this step, you can start making calls and sending texts to all your friends and contacts. The best thing about TextNow is that you can make calls with high-quality audio, even if the other person doesn't have the same app. Plus, you can send text messages and even images (jpeg, png, gif).

TextNow is an interesting app for calling that works on pretty much any device: computer, tablet, smartphone.. whatever. Plus the fact that it's free makes it even better.