Delphinus DNS is a non-caching, non-recursing DNS server that serves authoritative answers for A, AAAA, CNAME, DNSKEY, DS, MX, NAPTR, NS, NSEC3, NSEC3PARAM, PTR, RRSIG, SOA, SRV, SSHFP, TLSA, and TXT resource records. It serves both on IPv4 and IPv6. Here is DelphinusDNSd's homepage.

Other Software

Software of mine that isn't being written on or maintained is here (some of it is broken even):