IPGofer

IPGofer provides a simple solution to the problem of your own IP address changing.

This is a simple version of some dynamic DNS services. It's not as comprehensive as such services. But it is free, it doesn't require registration with a third party or registration or transfer of a domain name.

How does it work?
IPGofer polls your IP address regularly. When your IP address changes, he creates a file that you have configured, containing the new IP address and FTP's it to a server that you specify.

For some examples, see IPGofer's home page.