Flot is a pure JavaScript plotting library for jQuery, with a focus on simple usage, attractive looks and interactive features.
Works with Internet Explorer 6+, Chrome, Firefox 2+, Safari 3+ and Opera 9.5+
Percentage Loader is a jQuery plugin for displaying a progress widget in more visually striking way than the ubiquitous horizontal progress bar / textual counter. It makes use of HTML5 canvas for a rich graphical appearance with only a 10kb (minified) javascript file necessary , using vectors rather than images so can be easily deployed at various sizes.
jqBarGraph is jQuery plugin that gives you freedom to easily display your data as graphs. There are three types of graphs: simple, multi and stacked. All you have to do is to pass your data to this plugin.
There are a lot of settings to tune appearance of your graph, as are animation, color scheme, dimensions etc. Also, you can additionally change look and feel of graph via CSS.
jQuery Gantt Chart is a simple chart that implements gantt functionality as a jQuery plugin. Plugin uses AJAX to retrive JSON data and render them as Gantt chart with many features such as zooming or paging.