This executable will e-mail the new IP address if it has changed since the last time the program ran. You can set windows task scheduler to run this and know when your home computer IP changed.
The program dynDNS-Updater is a universal program to update DNS information. It is written in Java 5.0 and runs as a daemon. Additional information can be accessed through the projects home page.
Finally! An extensible, cross-platform dynamic, static, or custom DNS update client! This simple Javaprogram will keep your domain name always pointed at your computer. Supports multiple ways for obtaining IP, updating domain, and reporting errors.