I used "Rafflecopter" for the giveaway I just had and they allow you to pick winners using their "randomizer" thing. :-)
(Prizes based on blog comments.)
Winner of stuffed cupcake: Angelique
Winner of stuffed cupcake: Jessica M.
Winner of Scrabble tile necklace: Julia C.
Winner of journal: Lea K.
Winners - please email me and send me your mailing address so I can send out your prize. Thanks to all who entered!