Squid!

Privoxy is a non-caching web proxy with advanced filtering capabilities for enhancing privacy, modifying web page data and HTTP headers, controlling access, and removing ads and other obnoxious Internet junk. Privoxy has a flexible configuration and can be customized to suit individual needs and tastes. It has application for both stand-alone systems and multi-user networks.

Varnish Cache is an open source, state of the art HTTP application accelerator. You can install it on your HTTP server and it makes your application more accessible.

A small and fast caching web proxy (a web cache, an HTTP proxy, a proxy server). Polipo can be used in place of ad-filtering, privacy-enhancing proxies such as Junkbuster, Privoxy or WWWOFFLE. As Polipo has much more refined HTTP support, it doesnt impose the speed tax usually associated with such proxies.

For those who have not yet been introduced, meet the Proxomitron: a free, highly flexible, user-configurable, small but very powerful, local HTTP web-filtering proxy. To become better acquainted, please see our online version of the Proxomitron Help files for a more comprehensive overview.

Artica Proxy is an appliance that claim to manage Squid-cache proxy with all features that Squid Cache provides.With the Artica Web interface you can monitor, manage get statistics of your proxy service.Artica Proxy provides ISOs in order to build a full proxy appliance without any technical skills.Artica Proxy allows to enable Web filtering engine with more than 30.000.000 categorized websites.Other features included such as reverse-proxy, RDP proxy, VPN, DHCP, DNS...

Tinyproxy is a light-weight HTTP/HTTPS proxy daemon for POSIX operating systems. It is free software, and supports transparent and reverse proxying.

Proximodo is a loopback proxy server, seemingly a fork of proxomitron though likely abandonware. Unlike Proxomitron its developer is not existentially challenged. Additionally Proximodo can use Proxomitron filters. Unfortunately it does not support SSL connections. This could be one answer to browser fingerprinting. It is a less browser-intensive mode of adBLOCKing / adBLOCK / adBLOCKer.

The problem with other ad-blockers for Safari is that they are implemented as awful hacks: as an InputManager and/or ApplicationEnhancer. This compromises the stability of Safari and very often create problems when Apple releases a new version of Safari. Snow Leopard doesnt support the InputManager-based blockers when Safari runs in 64-bit mode.

Acrylic is a local DNS proxy which improves the performance of your computer by caching the responses coming from your DNS servers.

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 »

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.

SquidMan is a MacOS X graphical installer and manager for the Squid proxy cache. It is designed to operate as a "personal" proxy server.