Bandolier is a print and Internet journal which finds information about evidence of effectiveness (or lack of it), and puts the results forward as simple bullet points of those things that worked and those that did not: a bandolier with bullets. Information comes from systematic reviews, meta-analyses, randomised trials, and from high quality observational studies. Access is free.

Collection of clinical textbooks, journals, and reference materials. Excellent source for background information.

Access Medicine - McGraw-Hill's AccessMedicine.com is an online reference resource that includes Harrison's Online, Current Medical Diagnosis & Treatment, other core medical texts, Lange clinical review library, USMLE review, drug information, patient education, and many more resources.

MD Consult - Web portal containing full-text content of over 50 publishers and other organizations. Access includes full text textbooks, Clinics of North America, full text journals, practice guidelines, drug information, yearbooks and patient education.