He has fulfilled requests to supply source code at sourceforge.net This program runs what they refer to as Gnutella 1 & 2.

Originally posting in the LimeWire section is what got most people's back up.

I've seen snapshots by another member & seems to work well on Gnutella 2 with 10 nodes. I'd like to check out how it runs on gnutella (1). I'll check it out when I get time.