KF Web Server is a free HTTP Server that can host an unlimited number of web sites. Its small size, low system requirements and easy administration make it the perfect choice for both professional and amateur web developers alike. Supports: CGI, sophisticated security settings, multiple ports, file caching, MIME settings, directory indexes and remote administration.

ApacheConf
ApacheConf is a shell for configuring Apache web servers, that will help you to tune the main configuration file httpd.conf. ApacheConf presents all the information in the file httpd.conf in a structured view.

Search Engine Friendly ISAPI Filter
Disguise dynamic pages as static ones. Static pages are much more likely to be crawled. Extra Features: Convert file extensions Easy administration Use to assist search engines in finding content. Show interested people your site

Savant
Savant is a full-featured freeware web server for computers running any version of Windows 95/NT or greater. It's fast, secure, and easy-to-use. Supports most common web server extensions. Savant is open source software.

ASP - IIS real-time monitoring tool
IISTracer is a real-time monitoring tool for Microsoft IIS scripts (.asp, .cgi,..), static files (.htm,.gif,..) and downloads (.mp3,.zip,..). Lets you show online current state and progress of each running request in IIS. Lets you log IIS state.

MetaCompress
MetaCompress packs requested content of a web site on-the-fly. This increases your site's accessibility for users who have a slow dial up connection and speed ups the loading of pages on your site in general.