Mathopd

Mathopd is a very small, yet very fast HTTP server for UN*X systems.

Mathopd supports useful features of HTTP/1.1, such as persistent connections, partial responses and pipelining. It does not support things like content negotation. The latest version of the software (1.5) also supports CGI/1.1.

Mathopd was designed specifically to run as a single process, and to never grow in size.