From Forum Nokia Wiki

Resolvr is a compact, easy to use and free as in beer Zeroconf framework for Symbian OS Smartphones.

Using Resolvr, you can make your IP networking applications behave in much the same manner you would use Bluetooth. You can advertise and discover services on the local network, and present available services to users using friendly, human readable names.

Resolvr is available for all Symbian OS smartphones running version 9 of the Operating System or above. However, Resolvr is also Open Source and written in such a way that it would be very easy to backport to older version of the OS if you need support for older phones.

Resolvr is licensed under the GNU GPL open source license. For any application for which the restrictions of the GPL are inappropriate, there is also commercial licensing available.