Trivia (4592 programs)
Pros: Free to Download and play. Cool graphics and sound effects.
Cons: Lots of bugs in the system. Advertisements pop up.
Pros: Over 250 different categories to choose from. Beautifully designed. Incredibly addictive. Fun, competitive gameplay. Can view statistics on Quizup.com.
Cons: Repeated questions occasionally appear in less popular categories. Some global trivia is geared towards an American audience.
Pros: Easy to play, but still addictive. Loads of words. Help for the most difficult words.
Cons: Early levels boringly easy.