IP Monitor

IP Monitor is a practical networking tool for PC users who have dynamic IP addresses. It monitors your address, notifies you whenever it changes, and triggers various actions at the same time, such as sending emails or playing audio alerts.

If you have Java installed, you can drop the program's files to a custom location on the disk or copy them to a USB flash drive, in order to seamlessly run IP Monitor by just double-clicking the executable .jar file. It doesn't update your system registry with new entries.

Regarding the interface, the application opts for a small window that shows details with its status, checkup frequency and current IP address, along with the last changed and change time. The current IP address can be checked on the spot, while the monitoring can begin with one click.

Before doing so, you may be interested in tinkering with settings when it comes to the checkup frequency (at least 10 minutes), URL for verifying your IP address, together with several types of alerts: audio (play a local .wav, .aiff, .au, .mid or .rmf file), email (configure SMTP settings and write an HTML message), visual (write a customized message to show on screen) and command (launch external program or open file).

You can switch to another UI theme, install, test and start an IP monitoring service, as well as log the app's activity to file for your later examination.

It worked smoothly in our tests, without hanging, crashing or indicating errors. CPU and RAM consumption was minimal.

To sum it up, IP Monitor comes loaded with useful options to let you know whenever your IP address changes, backed by rich customization options. It's free and open-source.