Considering I have all three of these, I'll presume this is concerning my site, haha.
The shoutbox you're referring to is called TaigaChat (see add-ons section), Get Social is a custom sidebar (I can give you the code for that if you want; it's nothing exciting), and Affiliates is another basic sidebar block with text links. It may also be worthwhile to see my "How to add a custom sidebar block" thread (I'll link later; off to class
).