I’ve used several screen sharing programs and tools including WebEx, VNC, GoToMeeting, and Skype. Some work great, some require some technical skills to install, and some are slow and not always cross-platform friendly.
Today at work we used Join.me for a presentation. It’s free, simple, cross-platform capable and worked great. Nothing really difficult to use about it and it loaded up quickly. You can share the control of your mouse with others, use a chat feature and more. I was impressed enough to go download a copy of the app in the middle of the presentation.
There is a paid version that offers more features, and perhaps best of all, there’s an API which would allow developers to integrate JoinMe’s features into their website – an excellent help and support setup!
It’s worth trying and would be a great tool for demos or training.