4. Epocrates:

There is no denying Epocrates is one of the best medical reference tools in the mobile format.  The free version of Epocrates, Epocrates Rx, provides great content: Drug monographs and health plan formularies, drug interaction tool, pill identifier, medical Calculator, and a new addition: Medical News and handpicked clinical articles.  For a review of the various premium versions of Epocrates click here.

Links:

iMedicalApps Premium version of Epocrates ReviewiTunes Link to Epocrates

Next Medical App: Free Medical Calculators