Key words
chat , free , download , word , word game , astronomy , space

Acrophobia
This site offers a free download of their client for Acrophobia a word game where you play and chat with other users.
 Bezerk
 

Animals
(soon to come)

AOL
(soon to come)

AOL Instant Messenger
(soon to come)

Astronomy
NASA has an official web presence full of all kinds of space related information, news and more.
 NASA

(more astronomy links soon to come)

AVP
The Anti Virus Protection program is an excellent virus scanner.  you can download the trial version for free it takes about 3 megs or so and is extremely easy to use.
 AVP
 

Basic
(soon to come)

Big Pond
An ISP provided by Telstra Australia
 Big Pond