SubEthaEdit - $35 [Mac] http://www.codingmonkeys.de
Having creative sessions and want to keep notes? This application is the perfect note taker. It allows you to collaborate on one open document across your network. It’s also rendezvous enabled so it’s easy for other Mac users to join in. Nice features such as color-coding for each user as well as time stamping make this a flexible tool.
If you need some groupthink without the use of a projector... then this is a perfect tool.