Pose Maniacs, which I wrote about in 2007, is a Japanese web site that features 3D models of human figures, rendered with superficial musculature, for sketching and drawing reference.
A high percentage of them are in an interface that allows you to turn them 360° on their vertical axis for a complete rotation of point of view (image above, original here).
Others are animation sequences that can be stopped in a particular position, say, in the middle of a run cycle, which can be very helpful for animators.
They have continued to add to their considerable catalog of hundreds of poses; and the site, which was originally only in Japanese, has been translated into English.
Wow… what a great resource! Thanks for the link.