I had come across that one. Looking closer it does seems pretty good, and matches my spec.

I've also come across WebGUI which looks good but I'm put off by the design of their site. The overall design is ok.. I suppose, but that text under the logo "Web Done Right".. considering it's a struggle to actually read that text I wouldn't particularly say that's done right. Hard to read text such as white on light background is one of my pet peeves.

I'm considering fashioning my own using Wiki::Toolkit and an JavaScript WYSIWYG HTML editor although I don't like the through of the maintenance. I've got more than enough coding work to do at the moment!