familydoctor.org
Helpful general resource page, useful for patients across the entire age range. Patients can print handouts covering many health topics encountered in outpatient practice.
http://www.doctorsforadults.com/
Excellent resource webpage targeted to adult patients with a variety of scientifically grounded reviews of health topics and tools for health self-management. (sponsored by American College of Physicians)
http://medlineplus.gov/
Large database of topics sponsored by the U.S. National Library of Medicine and the National Institutes of Health, targeting the general public.
For Proivders:
http://www.acponline.org/fcgi/pierpi.pl
Search tool that finds patient education information across the web. Uses PIER or Physician's Information and Education Resource tool.