ExaProxy - ExaProxy is a a high-performance non-caching proxy.
Squid Proxy - Website Content Acceleration and Distribution. Thousands of web-sites around the Internet use Squid to drastically increase their content delivery. Squid can reduce your server load and improve delivery speeds to clients.
Privoxy - Privoxy helps users to protect their privacy.
SquidMan - SquidMan is a MacOS X graphical installer and manager for the Squid proxy cache.
Section.io - section.io - the only developer first Hosted Varnish Cache and ModSecurity solution with Metrics, Diagnostics and SSL that helps developers build secure and scalable web applications. Sign-up for Free.
Proximodo - Proximodo is highly a customizable web filtering proxy server that allows its clients to bring into light all of those trackers that are hidden to them.