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.
DNS Flood Detector was developed to detect abusive usage levels on high traffic nameservers and to enable quick response in halting (among other things) the use of one's nameserver to facilitate spam. DNS Flood Detector uses libpcap (in non-promiscuous mode) to monitor incoming dns queries to a nameserver. The tool may be run in one of two modes, either daemon mode or "bindsnap" mode. In daemon mode, the tool will alarm via syslog. In bindsnap mode, the user is able to get near-real-time stats on usage to aid in more detailed troubleshooting.
ZoneAdmin is a Web interface for the powerDNS name server using the MySQL backend. It allows you to manage existing zones and add, remove, and alter new ones, supports on-the-fly input validation, and allows comments per zone and per record. Furthermore, it keeps a detailed history of changes and allows you to temporary enable or disable zones without having to remove them completely. New zones can use templates that contain predefined records. It is designed to be used with one of Apache's authentication methods.
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.
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.
DNSDusty is an uncomplicated Web-based DNS management tool. It does all of its modifications via signed dynamic updates, and gets info on zones via zone transfers. Thus, it does not require any external databases, and plays along well with other tools that do dynamic updates (such as DHCP). DNSDusty is written as a Perl CGI script, so it should work with most Web servers.