American Diabetes Association - the premiere diabetes website, packed with information on what diabetes is and how to live your healthiest life when you have it. You can find the latest research on diabetes here. They also have a 60 second Risk Test, that helps you understand your risk for developing Type 2 Diabetes, and how to improve your odds.
College Diabetes Network - CDN was founded in 2009 by a college student at UMass Amherst with Type 1 Diabetes who felt isolated and struggled to manage her diabetes. Now it is a peer-led national group that helps high school students prepare to successfully manage their diabetes in college. They also have resources to help parents navigate these years.