Volavarn and I have collected and hoarded these, in order to make good use of them one day. Now we decided to share them, so all of you could use them too:

Color Pallet Generator

Textures

Clothing References/Costumes

HD Movie Screenshots

People and Animals - Classes

Muscles and Bones

Anatomy - you have to log in with your google or facebook account though

Concept Art

and always remember

have fun :D