browsegate 3 nat proxy server

A SMTP gateway between your mail server and the Internet, catching spam/viruses.

It proxies IMAP transactions between an IMAP client and an IMAP server.

psyBNC is a proxy for IRC networks

WinSocks - Socks Proxy Server

proxy server HTTP, HTTPS, SOCKS v4/4a/5, FTP, POP3, UDP/TCP portmapping

This is a simple implementation of a proxy server that fetches web pages.

The Barracuda HTTPS Tunnel acts as a SOCKS, HTTP, and HTTPS proxy server.

Vilongu HTTP SOCKS tunneler is a transparent HTTPS/SOCKS proxy server client

RtspProxy is a proxy server for multimedia streaming services.

Open-Source Customizable Web Filtering Proxy Server