Polipo - A small and fast caching web proxy (a web cache, an HTTP proxy, a proxy server).
dnsmasq - Dnsmasq is a lightweight, easy to configure DNS forwarder and DHCP server.
ExaProxy - ExaProxy is a a high-performance non-caching proxy.
YogaDNS - YogaDNS automatically intercepts DNS requests at the system level and allows you to process them...
Privoxy - Privoxy helps users to protect their privacy.
BIND - BIND is by far the most widely used DNS software on the Internet.