mIRC
mIRC is a popular Windows IRC client. It runs as a standalone application with many features including, but not limited to, colored text, scripts, and channel favorites.
Download Bit'sJoint extras auto-configuration tool
The mIRC auto-configuration tool was written to get mIRC automatically setup for use on Bit'sJoint-IRC. To use, download both mIRC and the Bit'sJoint Extras installer. Install mIRC as a normal program and then run the auto-configuration tool and answer the questions as they appear. It is okay to overwrite the default mIRC configuration.