gury (pronounced "jury") is a JavaScript library designed to aid in the creation of HTML5/Canvas applications by providing an easy-to-use chain based interface.
oCanvas is a JavaScript library intended to make development with HTML5 Canvas easier. Instead of working with pixels, you work with objects. It's very straightforward and easy to get started with. Please have a look at the examples to see just how easy it is.
"There is a tool that came to make our lives as progressive web designers a bit easier: Modernizr. In this short tutorial, learn how to apply this handy script to maximum effect on your sites."