Gizmo is a free phone that you can use on your PC. Gizmo Project uses your Internet connection (broadband or dial-up) to call other PCs. With a click of a mouse, you can connect with friends, family and colleagues anywhere in the world. It's just that simple. You sound as clear as if you were in the next room. You can talk as long as you like. And it's all free. The biggest difference between Gizmo and Skype is that Gizmo has an open source API available for anyone to use, which can achieve the development of your own Gizmo.