Currently Mac only, but a Windows version is coming soon.

Website: powwow.cc

PowWow lets you screen share any application with anyone, no matter where they are. It's super simple and blazing fast. You each get your own mouse pointer, and you're both always in control. It's designed for collaboration, not just broadcasting your screen. It's like Google Docs for any application on your computer.

We use PowWow for everything from sharing XCode for pair programming or code reviews, to sharing Photoshop to iterate on the latest mockups, to sharing Google Chrome to write an e-mail together in the browser. We know you'll come up with some great uses for PowWow that we never thought of.

PowWow is designed to feel like you're sitting next to the person you're working with even when you're miles away. Right now we have a beta available for Mac. Windows is coming soon. If you'd like to be informed about big updates (like when the Windows version is ready), please sign up for our e-mail list.