MLdonkey is a multi-platform multi-networks peer-to-peer client. Originally, it was the first open-source client to access the eDonkey network. The protocol was 'reverse-engeneered' using an efficient protocol sniffer, Pandora.
Currently, with eDonkey , it supports several large networks, such as Overnet, Bittorrent, Gnutella (Bearshare, Limewire, etc), Gnutella2 (Shareaza), Fasttrack (Kazaa, Imesh, Grobster), Soulseek (beta), Direct-Connect (alpha), and Opennap (alpha).
The MorphOS release does not only come with the mlnet binary which was done by Sigbjørn Skjæret using his Objective-Caml port for MorphOS, it also features some extra stuff like zuul, an open-source PHP interface for MLdonkey, which was adjusted for use with Amiga browsers.
Download it from here!