dnscacheaudit is a simple Perl utility to audit entries in the BIND cache. At the end of each run, it creates a PDF report showing the number of domains in the BIND cache that have a different IP address in the cache than the reference servers. This utility is inspired by the CacheAudit utility by Jose Avila.
Bind DLZ on Rails is a Web-based user interface for managing BIND with the bind-dlz extensions on a MySQL 5.0 backend. BIND is a DNS server, and the bind-dlz extensions enhance BIND with support for database backeneds. This simplifies the management of thousands of zones and provides added redundancy (by way of database replication).
OpenNetAdmin provides a database managed inventory of your IP network (IPAM). Each host can be tracked via a centralized AJAX-enabled Web interface that can help reduce tracking errors. It also has the ability to generate DHCP and DNS configuration for individual servers from the data stored in the database. There is a command line interface for batch scripting that can be accessed remotely or locally.
OpenDD is a DynDNS client, written in C, and especially designed for small gateway machines, like a Soekris box. Its main feature is that it does not require any Perl or Python interpreter. It supports HTTPS, can send a mail report, and can run as daemon. It is also very easy to deploy.
popdns is a small daemon that aims at simplifying the use of roaming machines by allowing them to dynamically update their DNS entry using (nearly) any POP3-capable email tool. After having configured a new email source (with the POP3 protocol), users are authenticated using their system password and popdns automatically updates their DNS entry with the IP address of the connecting machine.