Pub med is a searchable database of research and literature. Specifically Complementary Alternative Medicine (CAM) on pub med filters out those articles that are only related to complementary and alternative medicine.
A wiki is a web site that can be altered by visitors and updated in this fashion. Wikipedia is a merger between a wiki and an encyclopedia. An impressive, large resource where you can look up almost anything from alternative medicine, plants to astrophysics.
Med Bio World is another large database of articles related to the field of medicine and healing.