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.
PowerDNS - PowerDNS offers open source DNS software, services, and support.
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.
AdGuard - Surf the Web Ad-Free and Safely. Shield up!
Unbound - Unbound is a validating, recursive, and caching DNS resolver.