net/avahi 0.9rc5p0 OpenBSD

Avahi is a free, standards-compliant implementation of the Zeroconf protocols Multicast DNS and DNS-SD.

It is a system which facilitates service discovery on a local network. This means that you can plug your laptop or computer into a network and instantly be able to view other people who you can chat with, find printers to print to or find files being shared. This kind of technology is already found in Apple MacOS X (branded Rendezvous, Bonjour and sometimes Zeroconf) and is very convenient.