Network Query Tool (NQT) is a one-stop solution for getting information about a domain or IP address. Instead of manually using different Unix commands or visiting numerous Web sites to investigate a host, just load Network Query Tool and enter the hostname or IP. NQT does the rest. It supports a large number of TLDs and ccTLDs.
UpdateDD is a command line tool that updates a dynamic DNS record. It supports the following features: Web-based IP-detection, IP address caching, configuration files with C-like syntax, simple interface for managing multiple accounts and hostnames, and status output to syslog. Supported services include: changeip.com, dyndns.org, eurodyndns.org, ovh.net, no-ip.org, ods.org, hn.org, regfish.com, and tzo.com.
DNSdoctor is a tool based on zonecheck that is intended to help with solving misconfigurations and inconsistencies in DNS zone files. It features a powerful configuration file, does not depend on policies, fine grained test selection (by test, categories, or zones), full IPv6 support (connectivity and AAAA records), and several input/output interfaces (CLI, GUI, CGI, and a dedicated mode for use inside shell scripts). It uses threads to cut down checking time and can be extended with new tests, interfaces, and reports, and features exception and cache mechanisms to simplify test writing.
mkrdns is a small Perl script that helps automate changes to your DNS zone files. It does this by reading your named.boot/named.conf file to find all the domains/networks for which you are authoritative. It then reads all of the forward zone files and generates PTR records which it inserts in the reverse zone maps.