Also a comprehensive survey of webserver software usage. Free version available. Server for electronic commerce sites. Free replacement for oracle web server. World-class, innovative new product designed to make web server management easier for everyone.
Plexus is a public domain http server written in perl.
Commercially supported full-featured HTTP server for embedding into hardware and software products. The Sambar server is a multi-threaded combined Web, Mail and FTP server. Its ease of installation and cofiguration make it a popular choice for small to medium websites. Independent Sambar Server support resources. Sambar mailing list archive.