Patrik Roos' young
Internet Book List (http://www.iblist.com/) is a collaborative index of books along with reader-supplied
ratings and other information, modelled after the
IMDB mentioned above.
nationalatlas.gov provides U.S. government-produced maps; in addition to various
general-purpose maps, it has maps with ecological, epidemiological,
and legislative information.
Netcraft (http://www.netcraft.com/) lets you look up information about web servers; they try to
analyse the headers of responses and other publically-available
information to figure out what web server and OS a site is running.
They can also provide uptime graphs. Useful for `this web
site is cruddy; I wonder if they're running IIS' kinds of questions
when you're too lazy to telnet to port 80 yourself. :-)
DSpace is MIT’s digital repository (intended as a durable archive
of digital works and out-of-print paper ones). The project
itself has a home page at
http://www.dspace.org/.
The North American Vexillological Society has lots of information about flags. It is non-political,
and while based in North American has members from all over the
world.
The
CIA World Factbook has background material prepared by the CIA on all the countries
of the world. The material in the factbook itself is in the
public domain (although the official seal of the CIA by law may
not be copied without permission). There's also a
low-bandwidth index.
The
Judaism 101 site at
http://www.jewfaq.org/ is a good place for goyim like me to go to look up what a particular
Jewish holiday commemorates or what to expect at a Passover seder
(although it's got a lot more information than that).