Bobsled is a free application for mobile phones, tablets and PC that allows you make free calls to landlines and mobiles numbers in the U.S. and Canada. All you need is to download the program , sign-in with a Facebook account, or create an account on Bobsled.
Installation and first use
Let's look at a step by step procedure on a PC:
Making a call with Bobsled
Tested on Windows 7