WatchYourIP is an IP monitoring program that will watch your Local and Public IP addresses and monitor them for changes. The program can be configured to email a list of users in the event of a change. Custom email messages can be created to say exactly what you want them to say to provide your users the correct information. WatchYourIP can be installed and run on Windows workstations or Servers.

The license of this software is Free Trial Software, the price is $9.99, you can free download and get a free trial.