A simple DNS analysis tool providing both IPv4 & IPv6 queries for A, NS, CNAME, SOA, MB, MG, MR, NULL, WKS, PTR, HINFO, MINFO, MX, TXT, AAAA, DS, RRSIG, NSEC, DNSKEY records. Also provides authorithy check and DNSSEC support.
The Internet Protocol Address Calculator is an open-source java-based tool. This calculator will assist network administrators to perform calculations over both IPv4 and IPv6 address space. A handy whois search client is also integrated into this tool.
DNScat is a "swiss-army knife" tool to tunnel traffic through DNS servers. It is a small, yet powerfull tool, similar to netcat. In conjunction with PPP server, it allows to build a VPN using DNS packets. DNScat is a useful tool for penetration testing.