But this week I found one more reason to like it : mochaui.com by Greg Houston.
It's not new, but I did not try it before, now I did and I think it's a great script to build some cool interfaces.
To quote the homepage : "Mocha UI is a web applications user interface library built on the Mootools javascript framework. The Mocha GUI components are made with canvas tag graphics."
It runs on all major browser and the homepage is clear providing demo, documentation, support and a nice script builder.
I am sure I will use it and first thing that comes to my mind (apart from work) is the dashboard of my blog.