Pi-hole - Pi-hole is a multi-platform, network-wide ad blocker.
MikroTik RouterOS - The main product of MikroTik is a Linux-based operating system known as MikroTik RouterOS.
Unbound - Unbound is a validating, recursive, and caching DNS resolver.
PowerDNS - PowerDNS offers open source DNS software, services, and support.
OpenWrt - OpenWrt is an open-source firmware based on Linux for wireless routers
BIND - BIND is by far the most widely used DNS software on the Internet.