Features - Free version
1. Visit join.me and get code, and invite others by emailing code, parties on other side just have to join using the code in url.
2. Once joined, screen can be broadcasted, paused, again broadcasted.
3. Free Internet Calling provided for talking to the participants
4. Free Chating provided for public chat with all participants or private chat with specific user.
5. Option to give control to other participants to share their screen.
6. Option to give control to participants to control your screen.
All these are available in free version, they also have a commercial version, which is based on the number of users. Additional features provided in professional version
1. Unique code for each broadcaster, rather having a new code everytime
2. Free desktop version provided, so no need of browser.
3. Schedule meetings in advance
What not, they are ultimate in the service they provide. This is another great tool in this video broadcasting segment. If you compare this tool to Screenr, join.me does not have sharing recorded video to social networking sites. join.me is more of live streaming done immediately.