From IRC Wiki
|Platform:||Web based IRC clients.|
|Homepage:||unavailable try http://sourceforge.net/projects/pjirc/|
PJIRC is a web based IRC client that has a variety of features such as smilies, nickname prediction, hilight support, UTF-8 encoding, time stamping, and much much more.
Supported Web Browsers
Should work with all browsers
Latest stable release
2.2.1 available from SourceForge here