3proxy!

Want to share Internet connection? Get every computer online through a single Internet connection? Maximize the efficiency of your Internet access on a limited budget? Look no further! Get CCProxy, a small Internet sharing software! It will provide you a cost-effective Internet sharing solution without losing ease of use and peace of mind.

Feature summary from website: * Internet connection sharing with demand dialling * HTTP proxy, including FTP over HTTP * SOCKS5 * SMTP & POP email proxy * NNTP proxy * Outlook Express / Hotmail email proxy * TCP tunnel (tunnel any TCP protocol) * HTTP cache * Connect to ICQ and MSN easily * HTTP 1.1 persistent connections, RFC2616 and RFC2518 compliant. See Compliancy below. * Demand Dialling, auto connect/disconnect * URL filtering has been replaced by Resource Security which allows username password authentication and access to * resources. * URL and IP address filtering from imported Ban Lists * Remote access to display statistics of users * Access controlled by user and calendar * Resources include IP addresses, ports, URLs, paths, IP services * Comprehensive access logs which are user configurable * Create users and groups and/or authenticate to a Windows domain * Built-in web server * Run as a service under Win NT/2000/XP/2003 or Win98/Me * Message logging and dumping * Connect to another Proxy server or connect directly to the internet * Bind to a specific network interface for added security ("local binding") * Works with Dial-up Networking and Cable/Broadband »

Lusca is a fork of the Squid -2 development tree. The Lusca project aims to fix the shortcomings in the Squid-2 codebase whilst maintaining the the Squid-2 functionality and stability.

Formerly a commercial product, Yahoo! donated it to the Apache Foundation, and it is now an Apache TLP.

WinGate Proxy Server is a highly capable integrated Proxy server, firewall and email server designed for access control, security and communications needs. What you do get is all the features of Standard license for 3 concurrent users.

gate - Performance & scalable I/O forward & reverse HTTP proxy based on node.js + V8 a real alternative to Squid & NGINX