Free network messenger app?
Had some teachers come back after seeing a network based instant messaging program at a school they visited, now they want the same sort of thing.
It needs to be free, or very cheap, and work by computer names (or login names) or by browsing the network for connected clients. It only needs to be able to pop up a simple message from one computer to another and be easy enough that teachers can use it with minimal training. Also it would be best if it did not require the teacher to login to an account. (don't want much do I/).
Google talk almost meets this requirement, except then I have to create accounts for all the teachers and get them to make sure they login.