Test Car Safety
Although researchers who are investigating how safe cars are usually use crash dummies, to get the most accurate results it is necessary to use real bodies. This allows them to get an indication of exactly what damage would be done to a person if they were involved in a crash. These bodies are usually donated by people before they die.
Powering The Electric Grid
Some Scandinavian countries have modified normal crematoriums to make them much more useful to society at large. Rather than simply allowing the heat generated to be wasted, they have added equipment to allow them to produce electricity for the energy generated during the cremation process.