Pillbox - prototype pill identification system
http://pillbox.nlm.nih.gov/index.html

enables to search unknown solid-dosage medications (tablets/capsules) based on physical characteristics and images. The system combines high-resolution images of tablets and capsules with FDA-approved appearance information (imprint, shape, color, etc.) to enable users to visually search for and identify an unknown solid dosage pharmaceutical.  This system is designed for use by emergency physicians, first responders, other health care providers, Poison Control Center staff, and concerned citizens.  Annotated link http://www.diigo.com/bookmark/http%3A%2F%2Fpillbox.nlm.nih.gov

A site that identifies pills