Though everything below is free at the time of this posting, that can change at any time. Make sure you check the price before you purchase!
Galaxy Zoo - Space/Educational The Toymaker - Political
4.5 stars over 6 reviews 5.0 stars over 13 reviews
Quisr - Trivia Chasing Mona Lisa - Historical
4.1 stars over 25 reviews 4.0 stars over 70 reviews
Virtual Makeover - Games Love of Cooking: Salads - Cookbook
3.3 stars over 104 reviews 4.9 stars over 11 reviews