W3.org:

W3.org has 287 URLs listed in 163 Dmoz categories.

User Agent Accessibility Guidelines 1.0
A recommendation from the W3C for how to designing user agents to lower barriers to Web accessibility for people with disabilities.
http://www.w3.org/TR/WAI-USERAGENT/
Top/Computers/Software/Internet/Clients/WWW/Browsers/Accessibility

Tools for WWW providers
An archive page from W3C.
http://www.w3.org/Tools/
Top/Computers/Software/Internet/Directories

Audio, Video, and Synchronized Multimedia
Homepage of Synchronized Multimedia Activity at W3C
http://www.w3.org/AudioVideo/
Top/Computers/Software/Internet/Servers/Media

CERN httpd
No longer maintained, but possibly of historical interest.
http://www.w3.org/Daemon/
Top/Computers/Software/Internet/Servers/WWW

W3C Web Walker
Sample robot application With portable source code, using the LibWWW library, which can be used to create a link checker application.
http://www.w3.org/Robot/
Top/Computers/Software/Internet/Site_Management/Link_Management

Extended Log File Format
W3C's description of the Extended Log File Format. Most flexible of the log formats
http://www.w3.org/TR/WD-logfile.html
Top/Computers/Software/Internet/Site_Management/Log_Analysis/Articles

WWW - The Libwww Line Mode Browser
A character based Web browser developed for use on terminals which uses the libwww HTTP/1.1 implementation including a full HTTP/1.1 persistent cache, and history lists.
http://www.w3.org/LineMode/
Top/Computers/Software/Operating_Systems/Linux/Projects/Internet/Web/Browsers

Amaya
The World Wide Web Consortium's browser/editor of record. Includes support for HTML 4.01, XHTML 1.0, XHTML Basic, XHTML 1.1, HTTP 1.1, MathML 2.0, many CSS 2 features and SVG. Includes Annotea, an annotation application based on XPointer and RDF. Instruc
http://www.w3.org/2002/09/amaya-darwin
Top/Computers/Software/Operating_Systems/Mac_OS/Internet/Web_Browsers

Speech Synthesis Markup Language
The current version of the (draft) proposal for an XML-based Speech Synthesis Markup Language, as part of the W3C's Speech Interface Framework. This is an industry standard in the making.
http://www.w3.org/TR/speech-synthesis/
Top/Computers/Speech_Technology/Speech_Synthesis

The Behavioral Treatment of Self-mutilation
Research paper on treating parasuicidal behavior, as a borderline personality disorder, with Dialectical Behavior Therapy. Includes references.
http://lists.w3.org/Archives/Public/www-amaya/2001JanMar/att-0235/01-DBT.html
Top/Health/Mental_Health/Disorders/Impulse_Control/Self_Injury/Articles