Markup Review

Database modeling tool by Lars Rönnbäck.

Powerful web application that uses HTML5 structural elements, canvas, and localStorage and is heavily JavaScript oriented. Once a model is created it can be animated, or converted to any number of formats, including SVG (image and code).

The navigation could have been wrapped in a nav element and the type attribute isn’t needed for the style element.

But these are minor complaints compared to the overall application which you simply have to use yourself to see it in action.