Winip allows internet users to access your computer via a free static host name e.g. mycomputer.somedomain.com, even though you may have a dynamic IP address. This lets others access your computer the same way every time, instead of having to enter a different IP address every time you reconnect to the internet. Winip is a Windows port of the UNIX DHIS client, and can use either dhis.org or compatible servers.
http://www.dragonmount.net/software/winip/