Gliffy, the Online Visio Killer
I so could have used this during the days of programming classes!
From Digg:
Two guys with some time on their hands have created a tool that might just become a Visio-killer. Gliffy is a free diagramming tool that works entirely in your browser. Like other online apps, it has inherent advantages over traditional software. Collaboration is easier,and so is publishing diagrams you create to the web.
