HOW DO I GET FREE APPS ON MY BLACKBERRY?

I know you guys are like uh... that's a no brainer, go and get it from blackberry app world. But the problem is I have Page Plus as my phone service and I pay my bill first. It is unlimited talk and text. My blackberry was also pre-owned. But it still has apps on it like bing, and a tiger woods game, the dark knight etc... Everytime I go to app world it freezes, anything I can do?