Conteg is a PHP class to negotiate the current HTTP request response for Web output. It issues full Response headers and can change the server response depending on the Request headers sent (as Apache does for static files). This can be used to avoid sending cached content that is up to date. It can also be used to serve load-balanced compressed output. The entire class is implemented in a single file, and only three lines are needed to use the class.
SPServer is a high concurrency C++ server framework library that implements the Half-Sync/Half-Async and the Leader/Follower thread pool patterns. It is based on libevent (Unix/Linux) and IOCP (Win32) in order to utilize the best I/O loop on any platform. It supports SSL for secure transactions. An SSL proxy, sptunnel, is included along with an embedded HTTP server framework, sphttp.
Shttp is a simple, partial HTTP/1.1 implementation built using the ServerKit framework. It's a little over 1000 lines of code, and serves well as a minimal lightweight HTTP server in closed/controlled/static content settings, as well as a learning tool for those interested in developing TCP-service-providing modules using ServerKit. Illustrating how easy it is to build efficient server programs using ServerKit, this module has demonstrated 7200 requests/second in AB benchmarks.
Crowd is a Web-based single sign-on (SSO) tool that simplifies application provisioning and identity management. It has connectors for popular open source projects like Apache (via Perl) and Subversion. Pre-built connectors for other popular commercial products like Jive Forums, JIRA, and Confluence are also available.
The dkLab Apache is a patched Apache distribution for those who plan to use the Apache Web server to serve multiple separate sites working under different, fully separated, and independent Unix users. It does not require you to install any OS kernel modules or disable setuid, and works correctly and intelligently with KeepAlive turned on and MaxRequestsPerChild greater than 1.
mod_log_dbd is a module for Apache 2.2+ that writes access logs to a database using the APR DBD framework. It's designed for simplicity and speed, and therefore lacks some of the features of other logging modules. It does, however, automatically create any needed tables and columns.
MKHINDEX generates HTML directory listings like the "Option Indexes" functionality of Apache. Other than the Web server, these listings are static. They greatly increase the performance of the Web server if you use it as a file server. MKHINDEX has been tested on Windows XP, Gentoo Linux, and Mac OS X.