Best chatsoftware.

[AtomicDude512]

I need a chat software that can talk to MSN, AIM and others pretty well and be stable. What kind of solutions do I have? Thanks!

 

[MrBond]

Trillian is probably your best bet, it does AIM/ICQ/MSN/IRC and maybe yahoo messenger.

No link offhand, it should be the first google result though.

 

[RedRooster]

Miranda IM is also a great alternative.
It's comparable to Trillian, except it's entirely plug-in based so it's even more compact. Plus the community seems more active in creating new plugins to increase the functions of the program.
Nice interface, but not as nice as Trillian's.
Either are great IMs though.