Here are some websites that I would consider using for review. I am sure you will be able to uncover a ton more if you look:
Study Blue Flashcards some people have found answering actual AP questions better use of their time than trivia. Jus sayin'.......
Presidential Review- from a legendary AP teacher in SoCal....Puke assignment on Steriods!
History Terms- from the same legendary SoCal teacher
Visual Literacy Powerpoint- How many of these historic figures do you know by their picture?
Crash Course US History- John Green- Really quick and lively 10-15min segments review lecture