...and

Limewire, (the free Windows version bundles spyware!)
PEERanha,
Gnucleus,
Xolox, (perhaps outdated but still good!)
and the new bearshare version!

Can somebody add the Linux clients please (besides Qtella)!

Morgwen

P.S.:

Etzi why your status says moderator and not Qtella developer? I wonder...