The free tutorial videos of Digital Tutors.
http://www.digitaltutors.com/training/free-tutorials
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Library of information mostly related to 3D artist in game industry.
http://wiki.polycount.com
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Video references of fighting, facial expression, men, women, children, animal moving, etc...
http://www.referencereference.com
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More inspirational than reference image collection.
http://ffffound.com
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Digitized copy of said book.
http://www.fineart.sk/photo-reference...e-drawing-all-its-worth-andrew-loomis
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Anatomy reference for both 2D and 3D. Pose, portrait reference photo as well as texture.
http://www.fineart.sk
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The free tutorial video section of the Gnomon Workshop website.
http://www.thegnomonworkshop.com/store/category/171/Free-Tutorials-All
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Human proportion calculator.
http://hpc.anatomy4sculptors.com
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Reference photo, man mostly, various costumes from military to fantasy to birthday suit. Cross-dressing galleries.
http://manstock.deviantart.com/gallery
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Mostly female pose reference. Lots of pose and view angle varieties, with many props but no costumes.
http://senshistock.deviantart.com/gallery
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