I know how much all developers love the documentation part of a project. But documentation is an integral part of software development, to ease the pain of the documenation you can use JSDoc Toolkit.
Pixastic works by utilizing HTML5 Canvas elemtent, so it does not work well with IE that does not support Canvas.
* High performance, customizable UI widgets
* Well designed and extensible Component model
* An intuitive, easy to use API
Ext JS supports all major web browsers.