Netfind
A research prototype that provides a simple Internet "white pages" user directory. It runs on SunOS 4.0 or more recent systems that are connected to the Internet (however, you can run Netfind on one server at your site, and let the others use Netfind on that server). Given the name of a person on the Internet and a rough description of where the person works, Netfind attempts to locate telephone and electronic mailbox information about the person.
(ftp://ftp.cs.colorado.edu/pub/cs/distribs/netfind).