Sonoguide: Ultrasound Guide for Emergency Physicians - Articles, videos, and images are now available from the ACEP Emergency Ultrasound Section for all emergency physicians needing training or review about using ultrasound for patient diagnosis, management, monitor, and treatment.
Online Emergency Ultrasound Exam - A free interactive modular exam covering all of the core applications of Emergency Ultrasound. Video, image and case-based questions for emergency physicians, fellows, residents and students to test their knowledge and understanding of fundamental aspects of Emergency Ultrasound. This resource is being updated and is offline at the moment.
Sonoworld - Almost 300 lectures and a bunch of clinical cases from a variety of expert clinicians and sonographers. much, though not all, of it is incredibly relevant for point-of-care clinicians. free registration and some really high quality content.
Emergency Ultrasonography - Over a dozen lectures and a lot of cases - there's residencies out there using this site as their didactic curriculum for emergency ultrasound.