Searching with <a href="https://en.wikipedia.org/wiki/gtk-gnutella" class="extiw" title="en:gtk-gnutella">gtk-gnutella</a> v0.96.5 in leaf mode on Debian GNU/Linux with Xfce 4. Not exactly default settings (or there would have been more results and fewer connections), but close.
<a href="//commons.wikimedia.org/wiki/User:AVRS" title="User:AVRS">AVRS</a>
GPL
self-made screenshot, an IP address pixelized