Here's a few programs I found that are cool and fun.

PalTalk 9.0  (Released 1-23-07) A HUGE update!! Looks like MSN messenger now its a  Very nice and fun chat program. Features include cams, voice, aol, yahoo, MSN and ICQ buddy lists, and tons of users. I go here for the excellent cam images and cool people to chat with. Now super fast with AOL, ICQ, Yahoo, and MSN messenger support Now has games in it too!!!!

iSpQ Video Chat 8.0.60 - (Released 2-22-08) A newer one of the instant messengers is mostly rooms  for cams but GREAT cam quality and lots of fun features more of a adult natured crow but I hang in here sometimes... For Mac and Windows! Its free for 30 days to try then after that its like $40 forever

ICQ Chat 6 - (Released 4-17-07) A very fun and easy chat client no chat rooms just private messages I have used it FOREVER since like 1995 or 96 . Its great to transfer files or get notices.. try it out  my UIN is 1616577  .

AIM 6.5.12.1 - (Released 4-2-08) Geeze one of the OG chat services.. This lets you talk with AOl as well as AIM users... Tons of users, has cam and voice and picture transfer :)