Here’s another resource for model reference called PoseSpace.com. And a blurb from the site:
ThePose Tool is a free, easy to use, interactive search tool that helps you find just the right pose. Without buying anything, you can use it for pose ideas, instructing models, planning compositions, practice, and inspiration. When you are ready to create finished works of art (our ultimate goal for this website), you can download the complete 24 views at full resolution starting at just $4.00 (17¢ per photo).
Their policy is:
The photos may be used as a reference for creating traditional art which may then be sold. For example, a drawing, painting, or sculpture is permissible under these guidelines whereas a work which uses the actual photos, such as a collage, would be prohibited. The photos may be used for games, videos, and digital art if first manipulated in a substantive way, for example, as the basis for a wireframe mesh, skin, or texture. However, they may NOT, in whole or in part, be resold, repackaged and sold, nor given away.
Please contact us if you have additional questions about how you can use the photos.