The LPE is good http://www.gnutellaforums.com/gettin...e-edition.html
Of course there's other good clients around, such as Phex, ShareAza, the old BearShare 5, GnucDNA clients, etc.

For light-weight programs: LW prototypes-lightweight (scroll down to the Beta section), . Phex, . Gnucleus, . the old Xolox, . and . GnucDNA Based BLAckFLAg and Getchaman

These latter light-weight programs will use less system resources, be easier to run on an older computer system.