This post was not only meant to shut up those people who say you can't share with Linux, ergo it sucks, but to show newcomers to Linux what choices they have.
BitTorrent
BitTorrent (Debian and Red Hat only)
Snark
Direct Connect
DCGUI
QuickDC
eDonkey
cDonkey (German)
eDonkey
Lmule
Xmule
FastTrack
gIFT-FastTrack (plugin for gIFT)
Gnutella
Gtk-Gnutella
LimeWire
Mutella
Qtella
Multiple Networks
MLdonkey (BitTorrent, Direct Connect, eDonkey, FastTrack, Gnutella, OpenNap, Overnet, and SoulSeek)
OpenFT
gIFT
OpenNap
Lopster
Overnet
Overnet
Proprietary
Apollon
Freenet (Anonymous)
GnuNET
Grapevine (Anonymous)
TheCircle
SoulSeek
Nicotine
PySlsk (dead project)
WinMX
Loophole
Bookmarks