DNS Automation Library 

Easily automate Microsoft DNS servers fully and dynamically with this programming library. Manage servers, zones, resource records. Save yourself hours of frustration and get the job done quickly - ideal for ISPs provisioning customer domains.
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IP Helper 

This IP Helper software shows you both your internal and external IP addresses, can notify you by email when they change, performs DNS and Whois lookups, and much more!
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MultiDNS 

Globesoft MultiDNS forwards DNS resolution requests to a list of secondary DNS servers, one by one, until the request successfully has been carried out and the name has been resolved.
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DNS Watcher 

DNS Watcher is a program designed to monitor and query DNS servers. DNS Watcher is mainly intended for use by webmasters and website operators to keep watch on their DNS entries and make sure the name servers are responding correctly.
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EzDNS 

EzDNS publishes and/or emails your PC's dynamic IP address (both local and outside address) and connection information to a remote web page or text file that is customizable. EzDNS is deal for people with cable or DSL internet.
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Interactive DNS Query 

Interactive DNS Query is a program designed to allow you to perform a query of DNS records. It is similar to the unix "dig" or "nslookup" commands, and uses a convenient GUI interface. Query for all types of DNS records, include A, MX, TXT, NS, ...
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