Excellent diagramming tool

Recently came across a website called lovely charts which provides an online diagramming tool. 

Lovely charts is a web 2.0 tools that allows you create charts for many purposes.  These range from swimlane designs, uml 2.0 to wire framing.  See below for a mock-up I did for the proposed hosting service for Question Mark.  You create and export to png for free from lovely charts but further features require payment.

GoAnimate

Recently I joined a social netowrking group called http://newtoolsclub.ning.com/ created by Jane Hart. This group is designed to review e-learning and development tools as they are known. There seems to be quite a varied change of individuals in the group so it should prove quite topical.

Also this is the first group "that I know off" that is built for educational designers/technologists/academics to discuss ideas.

Anyways on doing a little noseing about the group I came across a comment regarding GoAnimate. This website/tool enables people to create their own basic simulations, which you could put to students to create. An example could be how they go about planning something between set people or interaction etc.