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An object-oriented framework for JavaScript.

• current version: 1.0 (beta2)
• source code

IE7 { css2: auto; }

• current version: 2.0 (beta)
• download
• source code

A JavaScript compressor/obfuscator. Also available as a .NET application.

• current version: 3.0
• download
• source code

cssQuery is a powerful cross-browser JavaScript function that enables querying of a DOM document using CSS selectors.

Example:

// find all anchor elements with "href" equal to "#"
var anchors = cssQuery("a[href='#']");
// find all images contained by the above anchors
var images = cssQuery("img", anchors);

• current version: 2.0.2
• download
• source code

An XBL binding that allows Mozilla browsers (Netscape, Mozilla, Firefox etc) to use Microsoft DHTML Behaviors with little or no conversion. Mozilla and Explorer may then reference the same DHTML Behaviors (.htc files).

• current version: 1.1.1
• download
• source code

Valid XHTML - no sniffing.

Charl van Niekerk provides some additional information via Rob Collyer of Webforumz.

This is not a hack!

How to implement the <abbr> tag for Explorer with no JavaScript!

Select the link above and view the source for an explanation of how it works.