Websites of Knowledge?

AvantLegion asks: "Every now and then, I stumble upon a website that is just a veritable tome of knowledge - be it of a certain theme (like Snopes.com) or more general information (Everything2.com). Free documentation databases are invaluable, but rarely seem to come up very early in Google searches. What websites out there do you consider to be indispensable sources of knowledge? (save the obvious Slashdot jokes). Where do you look up information besides combing through search engine results?"

Comments

The Straight Dope

[slacy]

The Straight Dope

They've got a good search engine, and answers to all kinds of interesting questions. I've spent many an evening browsing through the archives...

IMDb

[epsalon]

The Internet Movie Database has everything there is to know about movies and TV series, and the people involved in them. An invaluable resource to all movie viewers.

You're missing the obvious ones

[eggstasy]

Wikipedia
How Stuff Works

Mathworld

[Ann Coulter]

has everything you want to know about math. Scienceworld has some cursory scientific information as well.

FAQs.org

[I Am The Owl]

FAQs.org is a large repository of USENET group FAQs. I find it indispensible when looking for an overview of particular topic, such as the comp.compression FAQ or the comp.graphics.rendering.raytracing FAQ. All kinds of interesting articles are to be had on that site alone, it's a fun read.

Also, I find that Security Focus has a huge backlog of very useful and interesting information for those concerned with computer security. In that same vein, dbaseiv.net [Google cache, the site seems to be down right now] is shaping up to be a huge repository of computer security knowledge.

The Linux Documentation Project is full of HOWTOs relating to Linux, if you've got a Linux problem that you need to work out (though HOWTOs make for really boring recreational reading).

This is just what I can come up with off the top of my head, I'll probably post a reply to this when I remember more.