dnsmasq - Dnsmasq is a lightweight, easy to configure DNS forwarder and DHCP server.
Polipo - A small and fast caching web proxy (a web cache, an HTTP proxy, a proxy server).
YogaDNS - YogaDNS automatically intercepts DNS requests at the system level and allows you to process them...
ExaProxy - ExaProxy is a a high-performance non-caching proxy.
Privoxy - Privoxy helps users to protect their privacy.
PowerDNS - PowerDNS offers open source DNS software, services, and support.