UBL (The Ultimate Band List)
You can find literally any singer or band in the world.
Onelist
You can join onto mailing lists like newsletters and fan clubs.
Sound America
You can find sounds from everywhere: cartoons; movies; TV; stand up comedy.
Hotmail
You can get your own, free, private e-mail.
Much Music
Canada's official music station's website. They have everything there.
Theme World
You can download desktop themes for your computer. (You must have PLUS!95
3 Deep's Official Website
Since I didn't mention them here, this is their official website.