Dermatology Image Atlas, Dermatlas, is an outstanding free resource with almost 13,000 images contributed by more than 600 clinicians and is available at https://dermatlas.med.jhmi.edu/derm/.
The home page at the above address also has an oustanding list of dermatology links. The list is so exentensive that anyone with a special interest or expertise in dermatolgy will want to review the links.
In the links is a free pediatric dermatology textbook online.
There is an excellent free audio visual lecture course on dermatopathology called Dermatopathology Master Series, available at https://www.mdlive.net/dermpath_sch.htm. It alone is reason enough to visit the Dermatlas site.
There are 14 CME courses developed and presented by Johns Hopkins medical students.
The website search engine is flexible and powerful. Visit the site, you won’t be disappointed.