Blueberries.

http://www.nutrition-and-you.com/blueberries.html

Blueberries are among the highest anti-oxidant value fruits. The ORAC value of 100 g fresh blueberry is 5562 TE (Trolex equivalents). Their antioxidant value largely derived from poly-phenolic anthocyanidin compounds such as chlorogenic acid, tannins, myricetin, quercetin and kaempferol.

http://www.livestrong.com/article/251686-nutrition-information-on-blueberries/

http://www.blueberrycouncil.org/health-benefits-of-blueberries/blueberry-nutrition/

http://www.ehow.com/about_5101275_nutritional-information-blueberries.html