What exactly is it? Multi user video chat with screen sharing? If so, then Hangouts and Skype would be obvious alternatives
Obviously. Sometimes posting here in the forums, someone gives me an alternative to software I now use or some trick I learn. For all I know there's a diamond in the rough when it comes to screen sharing type software and/or websites.
Replies
Google Hangouts is the best though. Unless you need remote control of a PC, then Team Viewer.