As near as I can make out all the software that can run the Gnutella network are called Clones. They were reverse engineered from the original Gnutella program. Some times they are also referred to as Clients, although that may be after their installed and running.
Hope your finding things and learning!
A wealth real technical info can be found at
http://www.limewire.com/index.htm
check out the developers sectiom.
[This message has been edited by lightstone (edited 02-25-2001).]