Literally Canvas is an extensible, open source (BSD-licensed), HTML5 drawing widget that currently supports a minimal set of drawing operations. You can draw, erase, set the color with the eyedropper, undo, redo, pan, and zoom. It depends on jQuery and Underscore.js
Easy to use javascript plugin to draw nice boxes and arrows to your website from simple markup like User and Admin. Some Features are different arrow types, linking elsewhere, highlight nodes and arrows! Use Dummy nodes to get more space HTML in your texts.
The jQuery Visualize plugin provides a simple method for generating bar, line, area, and pie charts from an HTML table, and allows you to configure them in a variety of way. In the example in demo, we have an HTML table populated with sample data of a number.
LiquidCanvas can be used to draw all sorts of graphics without any actual images, such as drop shadows, rounded corners, gradients, borders, and shapes. The developers demo page shows a lot of examples. I have seen a lot of forum posts discuss how the plugin looks great in Firefox.