菜单类：
http://www.designchemical.com/blog/index.php/frequently-asked-questions/floating-menu/
http://www.sitepoint.com/make-a-mega-drop-down-menu-with-jquery/
树：
ztree
http://www.baby666.cn/v3/demo.php#_101
表格
jqGrid
http://www.trirand.com/blog/jqgrid/jqgrid.html
信息提示插件
http://code.drewwilson.com/entry/tiptip-jquery-plugin
http://gdakram.github.com/JQuery-Tooltip-Plugin/
jQuery的UI工具包 jQuery Tools
http://jquerytools.org/