Gnutface

Gnutface is a gnutella client in the form of an eclipse plugin. See eclipse.org for information on the eclipse platform.
Gnutface uses the open source limewire engine for its gnutella engine. See limewire.org for information on limewire.
Gnutface has been released under the GNU GPL.

Note: The developers of this project do not condone copyright infringement or piracy and accept no responsibility for your misuse of this tool - use at your own risk.

Status

Gnutface is currently in an alpha stage - most of the functionality is present but bugs are numerous. It should still be quite usable though. Note that Gnutface has been built agains Eclipse 3.0 M7. It has not been tested against other versions.

for more information: 

http://gnutface.sourceforge.net/