Enter . Instead, it works right inside your browser-any browser, on any system (Windows, Mac, or Linux).

All you need is a microphone (the one in your webcam will do) and/or headset. You can make free calls to other Gizmo users, toll-free numbers, various college campuses, and other VoIP networks (like Earthlink and LiveVoip). Here's the .

As with Skype, if you want to call landlines and cell phones, you'll need to purchase blocks of call-out credit (which start at $10 for 500 minutes). You can also send SMS messages for about 7 cents apiece, great if you're traveling abroad and don't want to pay exorbitant roaming rates.

GizmoCall doesn't do video calls or even instant messaging, but it's definitely a cool and convenient way to make phone calls. And because it runs in a browser, you can actually embed it in, say, your blog. Neat stuff.