mdnsd is a very lightweight, simple, portable, and easy to integrate open
source implementation of Multicast DNS (part of Zeroconf, also called
Rendezvous by Apple) for developers. It supports both acting as a Query and
a Responder, allowing any software to participate fully on the
.localnetwork.

WWW: http://dotlocal.org/mdnsd/

 -- Dan Pelleg
daniel+mdnsd@pelleg.org