General Online Texts & Tutorials
eMedicine: Clinical Information by Specialty
Family Practice Handbook, University of Iowa
Family Practice Notebook
Merck Manual of Diagnosis & Therapy
Merck Manual of Geriatrics
Merck Manual of Medical Information - Home Edition
Merck Medicus
PraxisMD: Best Practice of Medicine

Medical Books by Specialty
Free Online Texts by Specialty

Subscription-Based Texts & Tutorials
Harrison's Online
UptoDate.com

Veterinary Medicine
Merck Veterinary Manual