CodeBurner for AIR

CodeBurner for AIR provides reference information and code examples for HTML and CSS, in a lightweight desktop application.

It's a desktop version of the original CodeBurner for Firebug, but with a standalone interface, and more dedicated search tools.
CodeBurner provides tools for accessing the information in different ways. There's a text-based search that matches element, attribute and property names as you type, and a DOM inspector for looking up objects that appear in the source code of any page.