nginx

Nginx for Windows is an HTTP and reverse, a mail, and a generic TCP/UDP proxy server.
Among numerous basic HTTP server features it boasts of Serving static and index files, autoindexing; opening file descriptor cache.

It provides accelerated support with caching of FastCGI, uwsgi, SCGI, and memcached servers. Besides that it works with Name-based and IP-based virtual servers. You are also offered embedded Perl among other numerous features.

As a mail proxy server, it offers user redirection to IMAP or POP3 server using an external HTTP authentication server among other features.

As a TCP/UDP proxy server it can limit the number of simultaneous connections coming from one address. It also offers IP-based geolocation.