AndyChat
Auspice IRC Services
BitchX
bnIRC
ccorp-irc
CGI:IRC
Chat Everywhere
Chatzilla
DarkFire (server)
Diomedes
DMDirc
DXirc
EKG2
Epic
ERC
Eteria
F-IRC
Fire
Gabber
Ghoti
Hircules
irccgi
ircII
IRCRelay
Irssi
jabbaIRC
Jinais (server)
jIRCii
jIRleeCh
kopete irc plugin
KVirc
Kwirc
Konversation
LostIRC
MiaouIRC
naim
NetPlug
Nebula
Opera
ParaIrc
Pidgin
Praya
ptyaim
Quassel
quIRC
qwebirc
Rhapsody
Riece
RoxIRC
savIRC
SeaMonkey
Services IRC
simple instant messaging
SIRC
SmIRC
Smuxi
Sula PrimeriX
TalkSoup
Tiny Tiny IRC
tkirc2
Web2IRC
WeeChat
WFIC
XChat
Xchat-Gnome
xconvers
Xirc
ZenIRC
Zircon