Takes a long time to find what you're looking for. Inc. A comprehensive guide of medical diseases, conditions, and treatments. Primarily a text-based encyclopedia. Best if you know the specific medical term for the condition you are looking up. Not useful for looking up information on medical devices.
Search engine tends to find unrelated pages.
Inc. A site designed for students trying to get into med school. Content includes med student diaries, chat rooms, books to buy, and links. Simulations for medical training could be very helpful for some projects. You'll need a chunk of time to explore and familiarize yourself with what's there. Not good as a quick reference.