Thingiverse
Discussion
Thingiverse is a useful and controvertial website. Although it's a great site for sharing 3D-designs to be printed, milled, cut or otherwise fabricated at home, it's also run by a commercially driven for-profit company.
The reason we describe the site here is not to promote its underwriters, but is to accept its value to the community, despite its limitatons.
Most of the user-generated content is specifically licensed under a Creative Commons License or Public Domain. This user-content IS where the value is, and it is this user content we apprecate and support.
Some background reading:
Perhaps even read this:(Required Reading) Please note that there is be a degree of conflict of interests between MakerBot-Thingiverse's owners and RepRap's developers.