Yahoo! Messenger - Chat with friends for free and enjoy stealth settings, PC calls, file sharing, photo sharing, SMS, emoticons, streaming radio, and more. Click here to download

MSN messenger: Windows Live Messenger gives you brilliant ways to connect and share your photos (and other stuff). Contact lists, emoticons, instant access to your friends. click here to download

Windows Messenger (XP): click here to download

Trillian - Chat with all your friends on mIRC, AIM, ICQ, MSN, and Yahoo Messenger. click here to download

AOL instant Messenger: AOL Instant Messenger. Exchange messages with friends, family, and colleagues online. Click here to downlaod