Before you ask, yes I have googled myself because my friend has quite a few blackberry playbook apps and games. I just haven't seen any good websites, it either costs or doesn't even work! Help please?
PBVN is the best place to download apps from.. Keep in mind though that owing to the recent change in the way BlackBerry prevents piracy from taking place, most new apps won't be available (eg. Asphalt 7), but most of the slightly older ones are still there.. And the android ones. Research on Sideloading if you don't know. Go to crackberry.com to learn how to sideload apps