Powerful, enterprise-ready, open source web server w/ automatic HTTPS
Python HTTP library with thread-safe connection pooling
NaviServer, a high performance web server written in C and Tcl
Ultra fast and low latency asynchronous socket server & client C#
Fast and low latency asynchronous socket server & client C++ library
Embedded C/C++ Web Server
Martian is a library for building custom HTTP/S proxies
A fast, light-weight proxy for memcached and redis
Multiple server/webapp vulnerability scanner
An easy way to make REST resources available from C++ applications.
ICAP Daemon that implements content scanning
Authentication, Access Control, and Single Sign-On
Online gallery factory
Free-SA is report generating tool for web, proxy and mail log files
Base for HTTP-REST Java application
Fast and efficient web server