Check out these links to great sites, which are mostly #FOAM (free, open-access medical education).
Internal Medicine
Cardiology
Amal Mattu’s Emergency ECG of the Week
Critical Care
Emergency Medicine
Academic Life in Emergency Medicine
Critical Care Perspectives in Emergency Medicine
RAGE Podcast: Resuscitationist’s Awesome Guide to Everything
The Skeptics Guide to Emergency Medicine
SMART EM (Scientific Medicine and Research Translation)