Fascinating: VisualScript. (I love their floor plan scenario.)

"By generating XML from a diagram, VisualScript makes it easy to collaborate with other developers and even non-experts. Instead of decoding long lines of script, you can discuss a process or a problem using simple visual metaphors rooted in the real world. Code can be encapsulated in meaningful symbols that represent important steps in a process. Lines connecting symbols can show relationships and hierarchy. VisualScript diagrams not only illustrate and clarify processes, but now they also generate XML code."