A Fast Reverse Proxy
NSmartProxy is an open source reverse proxy tool
glider is a forward proxy with multiple protocols support
Anti-Spam SMTP Proxy Server implements multiple spam filters
Lightweight, high-performance, powerful intranet penetration proxy
One of the most advanced DNS Proxy and DNS Firewall in one product.
Intranet penetration tool that proxies local area network computers
Proxy client requests to backend server
A WHOIS client written in Java (RFC #954)