General:
 * CobraScgi
 * SharpWebServer
 * KayakWebServer
 * [http://www.codeplex.com/AntiXSS AntiXSS]

Testing:
 * [http://twill.idyll.org/ twill]
 * [http://seleniumhq.org/ Selenium]

Search help:

 * Web apps
 * Web development
 * Developing web applications

See also: RelatedProjects, DotNetProjects, LibraryTopics