American Diabetes Association: https://www.diabetes.org/
Health, Resources, and Services Administration: https://www.organdonor.gov/
In many states, people younger than 18 can register to be a donor, although their families will have the final say if the occasion arises for donation before they turn 18. Sign up to be an organ donor: https://www.organdonor.gov/register.html
Donate Life American
https://www.donatelife.net