I am the co-founder of Sae Somang International Foundation (Sae Somang is Korean for "New Hope"), a US-based non-governmental organization that aims to help the people of North Korea.
How? North Korea has access points that most Americans don't know about. Namely, the border between China and North Korea is quite porous, and North Korea allows people to enter through China for aid purposes, even with a US passport (although you're closely watched the entire time you're there).
Who? My mother, Lily Yi, is a full-time missionary with a passion for impact in North Korea. For the past 7 years, she has lived in Northeastern China (the border region near North Korea) and has provided aid and charity to North Koreans in several forms (rice, soy milk, coal for heat, fuel for farm tractors, blankets, sanitary napkins, etc.). Most interestingly, her mission work comes in the form of sustainable practices - instead of simply giving the people of North Korea blankets, she has set up a government-sanctioned sewing factory in North Korea that employs North Korean women and produces a needed product. Lily has an extensive network of other like-minded individuals who she works with, and Sae Somang International Foundation is the non-profit vehicle established so that she can give her donors tax deductions.