Proxyrama is a tool for finding and testing proxy servers. it will test them for anonymity, speed, if it's a gateway proxy, 'connect' support (=chainability), socks 4/5 support and geographical location. furthermore, it can be used as a local proxy server that redirects your traffic through a arbitrarily long chain of anonymous proxies and let's you skip images, multimedia crap, ads, popups etc.

Tor is a network of virtual tunnels that allows people and groups to improve their privacy and security on the Internet. It also enables software developers to create new communication tools with built-in privacy features. It provides the foundation for a range of applications that allow organizations and individuals to share information over public networks without compromising their privacy.

AliveProxy Server consists of proxy server with anonymizer features (allows you to share your Internet connection among several computers at home or in the office), multithreaded proxy checker with import/export functions, tools for testing connection speed and performance of sites. This integration allows you to collect proxy lists, test performance of proxies on specified URLs, and immediately use the best proxies for web surfing.

Privoxy is a web proxy with advanced filtering capabilities for protecting privacy, filtering web page content, managing cookies, controlling access, and removing ads, banners, pop-ups and other obnoxious junk. It is based on the Internet Junkbuster.

win32 proxy server progged in easy visual basic, WinSock-Pool, SOCKS4/5, SMTPRelay, Gateways, DialUp-Manager, HTTP(S)-Proxy, WEB-Server(PHP,XML,Dir), Remote, Shutdown, Port-Mapping, FTP,cryptapi socket,*Web-Adblocker*, nt-service, telnet.

Hamachi is a zero-configuration virtual private networking (VPN) application. In other words Hamachi is a program that allows you to arrange multiple computers into their own secure network just as if they were connected by a physical network cable.

TC-Wrapper is a Windows service which opens/closes TrueCrypt containers automatically using an USB-Stick with a key file. Containers are even mounted if you are not logged into your system.

K-Meleon is an extremely fast, customizable, lightweight web browser based on the Gecko  layout engine developed by Mozilla  which is also used by Firefox. Its focus is also on security and privacy.

Free open source disk-encryption software.