Google Local- Find Businesses and Services on the Web
Googlism- Find out what
Google thinks of People (just try it)
A9- Google with an Amazon.com twist
(again, just try it :-) )
Wikipedia- A free (open source) encyclopdia
Archive.org- Download everything from a cheerios advertisement from the '60s to a US Govt. "educational" Film about why the American Japenese were interred during WWII. And much, much more.
Howstuffworks- Self-explanatory
Terraserver- TerraServer contains 3.3 tera-bytes of high resolution USGS aerial imagery and USGS topographic maps.
~~Under Construction