MYIP is a simple TCP/IP utility for querying the current system's IP address as seen by the outside world.
This may or may not be the same as the locally-configured IP address, depending on how the system is connected to the Internet. This version fixes some bugs in older versions. It is now hosted at bitbucket.org.
I'm using this utility every day on my server to monitor my internet connection and log my outside IP addresses. Current code base is a few years old and so I decided to end test phase and pack it together for the public.
There's also an issue tracker at bitbucket you can use if you find problems.