Online Diagramming Web Applications

There are a slew of rich internet applications (RIA) out there for drawing and diagramming. Here is a brief review of some notable ones and a list of some others for completeness...

Scrapblog is a feature rich fun web application built using Flex 2. In terms of the smoothness of implementation it is slightly better than Gliffy (Open Lazlo). I guess this more to do with the fun-oriented design of the application rather than the implementation framework. And the embeddability is great - see the blog for some examples.

CumulateDraw is a poor third: similar functionality, but a terrible name, a basic implementation (raw javascript/html?), and poor usability (try the palette) let it down. Last and least, is Thinkature, which looks cool initially, but its limited functionality and slowness mean after a couple of minutes you want to browse elsewhere.

MindMeister might be worth tracking once it launches...

See also Kayuda , Mindomo , yWorks, bubbl.us
mind42, skrbl, ajaxSketch, FlowChart and an oldie: Imagination Cubed