there is acquisition, which is built on limewire code and also connects to the gnutella network. phex is another gnutella client.

oh, did I mention, they're both OS_X only. If your OS 9, well, then youre stuck with limewire i think.

there is overnet, which is a separate network and fairly popular but i don't know much about it.

and there is mldonkey (also for os X) that connects to the edonkey and other networks, but if you didn't get limewire to run, i advise against it.