Authoritative/recursive DNS server with ad blocking functionality. (Source Code).

Blackhole for Internet advertisements with a GUI for management and monitoring. (Source Code).

Local ad blocker. Like Pi-hole but local and using your operating system. (Source Code).

Fast and lightweight DNS proxy as ad-blocker for local network with many features (alternative to Pi-hole). (Source Code).

User-friendly ads & trackers blocking DNS server. (Source Code).