Hexagon
From ToolCenter
"Using only the universal and powerful Macromedia Flash plug in, running in a browser window, you can keep in touch with your colleagues wherever you are in the world. Not only can you see their present 'state-of-being', or get an immediate response to a 'quick' question using the inbuilt text chat, as with many other types of software, but you can actually see them working at their desk. As if they are just next door!" -- from the Hexagon home page at the Centre for New Media, a sub-group of the Knowledge Media Institute, a research and development lab of the Open University.