IP Monitor is a program designed to check your public IP for changes and notify you in several ways such as playing a sound file, sending an email, displaying a visual notification (if supported by platform) or executing a command. Under Windows, IP Monitor can be run as a service and under Linux it can be run as daemon.

It also doesn´t mess with the Windows Registry nor System folders, which makes it totally portable.

Features
Automatically checks your public IP address for changes
Provides several ways of notifying IP address changes such as playing a sound, sending an email, displaying a popup or executing a command
Can be run as a Windows service or a Linux daemon
Provides logging support
LookAndFeel support
Portable application
Multiplatform
Free, Open source

What´s New
Added logging support
Added Ubuntu/Debian Linux daemon support
The IP address is now checked by means of a thread, not freezing the user interface
The IP address is stored in a file when working as a service or daemon, in order to detect changes even if the system is restarted
Settings are saved when applying them, not only when the application exits, this way the service or daemon can be restarted and work with the new settings
Corrected a bug that prevented the autostart feature to work
Corrected a bug that prevented the IP address label from being updated after setting a wrong URL and then back to a correct one
Removed the regular expression field
JRE version upgraded to 1.6.0_18
JavaMail version upgraded to 1.4.3
Java Service Wrapper version upgraded to 3.3.9