Since References and Tutorials aren't the same thing, i Believe its a good idea to have an individual Thread for them.

Please post all your references here, with a brief description on what the references is about.

Anatomy:
http://www.biomotionlab.ca/Demos/BMLwalker.html
An interactive Flash Movie that allows you to visualize how a female or a male structure acts while walking under determined circumstances(happyness/sadness - relaxed/nervous - Heavy/Light).

http://www.posemaniacs.com/
Various 3D renders that can be rotated for perspective and Pose. divided into categories for easy search.

http://www.3d.sk/ (nudity)
A good photo bank with thousands of references. use the navigator at your left for best results.

http://www.innerbody.com/htm/body.html
Interactive site with a full description of the human body's systems and structures.

For all you Pokemon/fakemon pixelartists out there:
http://pokebeach.com/
One of the best non-sprite Pokemon image resources I know of. It's mainly a card site, and their search is down right now, so you might need a slight knowledge of the card game to find stuff, but Pokemon cards can be some of the best resources for finding Pokemon at different angles, etc. (runonsentence)
They also have Sugimori images.