New: Don't Sleep (Jul 11, 2022), Platform 22.0.1 (Jul 21, 2022) 400+ real apps (48GB), 1.05 billion downloads, Please donate. Downloads From PortableApps.com Working Again
Here is a small IRC client:
http://ironfist.at.tut.by/megairc.htm
It works quite well.
you also should be able to use Miranda plugin for IRC protocol, aswell Chatzilla client (extension for firefox)
Embrace your dreams
This looked like a good alternative however.
-Justin