iCall is another tool you can use to make free internet phone calls. With iCall, you can make free calls from PC to phone using their free software.
The computer that you make calls from can be anywhere in the world but for the call to be free, the number you call must be in the United States or Canada. You can't make free phone calls using iCall if you're calling outside the US or Canada.
iCall is available as a free desktop application for Windows, Mac OS X, or Linux and as a free iPhone app. Free phone calls will be disconnected after a short five minutes but you can call the number back again as many times as you want. You will also hear an advertisement before each call that's around ten seconds long.
A flash-based version of iCall is also available on their website but free calls here are limited to three minutes.
Download iCall and Create a Free Account:
Once downloaded, install the program, run it, and click the Signup for your free account button on the program's main window.
How To Use iCall:
After clicking Place call, a short (around 10 seconds) advertisement will play. When that's over, iCall will connect you to whatever number you dialed - for free.
You can also make free calls directly from the iCall website, meaning you won't have to download or install any software. However, calls are limited to three minutes using this interface.
A free iCall iPhone app is also available.