Polipo - A small and fast caching web proxy (a web cache, an HTTP proxy, a proxy server).
Trace - Visualized Node.js monitoring
ExaProxy - ExaProxy is a a high-performance non-caching proxy.
AdGuard - Surf the Web Ad-Free and Safely. Shield up!
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.
AdBlock - Ad blocker for Chrome, Safari and Opera on desktop and Safari for iOS devices.