KVIrc is the K-Visual IRC Client. It's a free portable Internet Relay
Chat client based on the excellent Qt GUI toolkit. KVIrc is being written
by Szymon Stefanek and The KVIrc Development Team with the contribution
of many IRC addicted developers around the world.  It has a full GUI
based configuration, floatable windows, built-in help browser, addons and
themes support (configurable from GUI or scripting), transparency support,
dran'n'drop toolbar editing, activity notifier as well as proxy support,
SSL and IPv6 sockets support, a modular arch which loads modules only when
necessary and a huge API for writing extensions
