mrhttpd
A lightning fast, simple, robust and secure web server.
Mrhttpd is a threaded web server that is lightning fast, simple, robust, secure and has a very small memory footprint. The binary is 15 to 20 kilobytes in size, depending on configuration and CPU architecture. Mrhttpd serves files at up to 4 times the throughput of Apache and runs CGI scripts. It scales very well with high levels of concurrency and responds very well to the BFS CPU scheduler by Con Kolivas.