It would be very nice if there would be portable version of X-Chat 2, lightweight and easy to use IRC chat application.
It's open-source, but official Windows build is shareware - but that's not a problem,
there are free unofficial Windows builds, which have exactly same features (except graphical smileys :D) - http://www.silverex.org/news/
It also doesn't uses registry, so I believe it would be easy to make portable version of it.
The Silverex FAQ has this
There currently is another fork of XChat, named PChat, in testing. Link: https://portableapps.com/node/22773 Note that I haven't tried it myself, and that it is still in testing and thus might have bugs.
Behold, the DutchLander has arrived.
Grammatical errors are copyrighted.
plus my fork is in continuous development and the windows version is always free, (not saying silverex's version isn't just he doesn't update nearly as often as I plan to update PChat)
your friendly neighbourhood moderator Zach Thibeau
I've used (and regularly use) PChat; it has a few minor glitches, but the overall experience is stellar.
I've dumped Chatzilla and Pidgin in favor of PChat, and I'm not looking back.
"The question I would like to know, is the Ultimate Question of Life, the Universe and Everything. All we know about it is that the Answer is Forty-two, which is a little aggravating."