USMLE-Rx - The app created by First Aid authors
Complete Anatomy - Groundbreaking platform for anatomy education and reference.
Dr. Najeeb Lectures - World's Most Popular Medical Lectures.
osmosis.org - Huge library of clear, concise medical videos
Pathoma - Fundamentals of Pathology
Sketchy Medical - Sketchy uses stories & pictures to make hard to remember facts a lot more memorable.