Diagnosaurus—1000+ differential diagnoses
First Consult—relates to MD Consult database
Patient Tracker "is an iPhone and iPod touch app that helps doctors and nurses track information about their patients... Store history & physical (H&P) and notes for each patient."
PubMed on Tap or PubMed on Tap Lite (FREE)
ReUnite "is an app for uploading missing and found person information for post-disaster family reunification..."