IPSentinel is an app for monitoring changes to your Mac's internal and external IP addresses.
Visit the website for more information and a demo.
Since the app registers itself to receive notifications of changes in machine IP address, it is always current.
This app is for users who do not require all the features of IPAddressSentinel (http://www.limitpointstore.com/products/ipaddresssentinel/), or do not want its menu bar status item displayed.
This app can :
• Email you when the machine address changes
• Email you when the external address changes
• Log status to system and private console logs