Ddclient is a Perl client used to update dynamic DNS entries for accounts on 'Dynamic DNS Network Services' free DNS service. It currently supports a lot of different routers and a few different services.
The project moved to github. See https://www.github.com/ddclient/ddclient for support.
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Other Useful Business Software
Time Doctor provides detailed analytics of where time is spent in the work day. See websites and applications visited when working and screenshots of the computer screen every few minutes while they work. Time Doctor will not only track the total time worked by every person on your team, but it will also provide a breakdown of how much time is spent on each project, client, or task. The time tracking data is accurate to the second so you can see exactly where time is spent and you can also verify where time is spent. You can use this data to bill clients or to have an accurate record for paying staff.