The only one I can remember that had relevance to modern medical treatment is the results of hypothermia testing. In camps, prisoners were made to take off their clothes and stay in freezing water for extended periods of time. Nazi scientists were trying to get estimated times of how long they would survive, and how long they could be exposed to certain temperatures without contracting hypothermia. They wanted to know to help their own troops on the Eastern front as well as downed pilots that were shot down over water. Their results are still used today. I'd like to think the victims of these horrendous crimes would have some comfort in knowing that the experiments performed on them help GOOD people today.