DUB - DENIM : An Informal Tool For Early Stage Web Site and UI Design

This is actually a really old tool, but I submitted it because it implements some solutions to the problems outlined in another recent submission: http://news.ycombinator.com/item?id=5076858

DENIM isn't exactly a wireframing tool though. It's more of a site concept development tool. I always felt like many of the ideas were great though, and with the widespread adoption of tablets, it seems like DENIM's second coming would make a lot of sense. We just need a tablet version.