If you don't have an instant messenger to send messages to your friends and pals, you should definitely get one. Here are some of the IM's preferred by DLAA.

MSN Messenger
AOL Instant Messenger
Yahoo Instant Messenger

However, if you don't want to download those programs into your computer, here are some links that pop up the same instant messengers, and work the same way (but without as many features as the original version) and you don't need to download them!

Yahoo Web Messenger
AIM Express
E-Messenger

*Meebo (this site will give you a web version of Yahoo, AIM, MSN, ICQ, Jabber and GTalk)

Alternatively, if you are interested in chat programs that handle all 3 instant messengers at once without having to download the seperate programs, these links may help you:

Gaim
Trillian

Anyway, I hope those links helped you! As you can see, IM's are the way of life...;)