Leo McCarthy In memory of his daughter who was killed by a drunken driver in 2007, Leo McCarthy started Mariah's Challenge. The nonprofit gives college scholarships to teenagers who pledge not to drink while they're underage. Nearly $150,000 in scholarship money has been awarded.

Connie Siskowski Connie Siskowski is helping young people who have to take care of an ill, disabled or aging family member. Since 2006, her nonprofit has provided assistance to more than 550 young caregivers in Palm Beach County, Florida.

Scott Strode After beating his addiction to drugs and alcohol, Scott Strode found support through sports. Since 2007, his nonprofit, Phoenix Multisport, has provided free athletic activities and a sober support community to more than 6,000 participants in Colorado.

Malya Villard-Appolon Malya Villard-Appolon is a rape survivor dedicated to supporting victims of sexual violence in Haiti. In 2004, she co-founded KOFAVIV, an organization that has helped more than 4,000 rape survivors find safety, psychological support and/or legal aid.