Diagrammr is a new site that lets you create diagrams just by writing sentences. I learned about it through the Make Use of blog, and it’s worth reading their post.
Unfortunately, I couldn’t try out the actual site because demand has exceeded their capacity, but I assume that will be fixed soon. Depending upon my experience with it, I might or might not add it to Not “The Best,” But “A List” Of Mindmapping, Flow Chart Tools, & Graphic Organizers.
It’s certainly different from the other web tools on that list.