irssi/irssi: The client of the future
IRC Nerds
freenode IRC webchat
Whalebird.social
IRCv3
Libera Chat
Element-web · Vector-im
The Lounge
Smuxi
KiwiIRC
Nettalk
HydraIRC · GitHub
IRCCloud
XChat
KVIrc.net
Irssi
mIRC: Internet Relay Chat client
Pidgin
Quassel IRC
Konversation
Synapse Documentation - Matrix.org
AdiIRC
WeeChat
HexChat
Synapse: Matrix
GNOME / fractal
Nheko reborn
Mibbit.com