rldns is an open source lightweight DNS server for linux, netbsd, freebsd, and openbsd. Runs on x86 and x86_64 architectures.
You can download it from the following link: https://packetstormsecurity.com/files/download/147586/rldns-1.2.tar.gz
Source: https://packetstormsecurity.com/files/147586/rldns-1.2.html