Best free IRC client?

[bandana163]

What is the best free IRC client? MIRC is good, but by no means free. Any ideas? What do you use?

 

[WillyF1uhm1]

I'm using xchat. A windows version is available.

 

[Coldfusion]

I'm using GAIM (Linux version). Windows version also available.
GAIM web page

 

[Barnaby W. Füi]

irssi