An old web associate of ours, Greg, has worked up the latest version of Rendur, described as "a web monkey sandbox", and that's exactly what it is... a place to play with HTML, CSS, and JavaScript and see your changes in real time, as you type.

The basic idea isn't terribly complicated, but Greg has implemented it in a really elegant way which contains features that make it not just cool, but actually useful as a tool. (For example: the ability to drag and resize the editing "window").

One really interesting application of this, would be using Rendur as a wiki-like single-page editor for "web monkeys" who would rather edit raw HTML and CSS than be confined to wiki markup. When tied into an appropriate authentication scheme, logged-in administrators could be shown the Rendur editing window, and could save their changes directly to file (using Rendur as a sort of editor/previewer)... those not logged-in could be simply shown the page.