Dojo Demo Engine
You can see original beta of the demo engine here.
The demo engine has now been officially released on DojoCampus. It is far more functional than the earlier beta, with more demos, more stability, back button support, and is much better looking and usable. You can access it at http://www.dojocampus.org/explorer and read my blog post about it at http://shaneosullivan.wordpress.com/2008/04/03/dojo-ajax-demo-engine-released.
See my first blog posting about this at http://shaneosullivan.wordpress.com/2007/12/04/a-new-demo-engine-for-dojo or my second blog posting at http://shaneosullivan.wordpress.com/2008/01/07/dojo-demo-engine-update/.