Join.me is a great application. This Free Screen Sharing application allows computer users to share desktops across the internet. It is not bidirectional, however control can be passed back and forth so users can control the other users desktop. It can also be used for desktop viewing. Live webcasts, Presentations, Remote Support, check! Not only is the integration seamless and nearly transparent to the user, the best part is that it is platform agnostic. Windows, Mac, Linux? Yes as long as it can run flash and java your golden.
To share your screen, one must simply download a small application to your Windows or Mac OS X PC. Then send the 9-digit code generated to your collaborator (an email is automatically created). They either click a link in the email, or navigate to the join.me website, enter their code, and they can instantly see your screen.
Via a single click on the Join.me interface you can enter VoIP or Instant Message your screen sharing participants. You can give them access to your deskop via the ‘Share control’ feature, should they need to make changes to whatever you are working on. And because the screen viewer requires only a Flash-enabled web browser, plenty of mobile devices can view your PC’s desktop, too.
The service also includes a free conferencing bridge that supports up to 250 participants.