The major VoIP programs that embrace free VoIP calling left on the Internet are bundled with your Instant Messaging programs. Programs such as Yahoo Messenger have recently been redesigned with the ability to make free VoIP voice phone calls. You won’t be able to call a landline telephone however. You will need to use the program to call another member who is using the same program.
For instance, you have the newly VoIP enabled Yahoo Messenger downloaded to your computer but your friend (who lives overseas) is still using the old Yahoo Messenger; you can send him a link so that he can download and upgrade his current version. Ones they have installed the new Yahoo Messenger, you will see a “call” button with a phone icon at the top of your Yahoo Messenger chat box.