In this post, you can find cheat sheets of Browsers, Color, CSS, Dreamweaver, HTML, Illustrator, Javascripts ( jQuery and mootools ), Photoshop, SEO, Typography, WordPress.
Nice overview of available data visualizers
Gantt charts, diagrammers, calendars/schedulers, gauges, mapping, pivot tables, OLAP cubes, and sparklines, in Flash, Flex, Ajax or Silverlight.
There are many variables that affect a site's performance. The tools listed below can help you discover those variables and improve your site. We recommend that you experiment with these tools. Multiple simple changes can improve the experience for your users around the world by several seconds.
These are links which take you to all the currently available offline bookmarklets. They are also available grouped by category. Recent additions are mentioned in What's New.