"I have used Etherpad; it is a good tool and still running at present. The code has been made available so there are other ones that are the same. Only 16 students can go on at once - at my school we were only able to manage 2 due to the network!"
"I would go for a mimio - wouldn't be without mine. Not only is it an interactive whiteboard but you can also take it with you if you teach in more than one class; or even on field trips (not that I have had the need to do this!)…"
"I also use wikispaces and have my team using them to. Some are not very tech literate and they find it easy to use although they know that they have me there to answer and questions and help out if need be. I am sure there are plenty of people who…"