Best Blackberry Aps??

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I have a Blackberry and I'm looking for some interesting (preferably free) aps I can download. Currently I have Poynt, which basically is like the White Pages and the Yellow Pages, except t can tell you what movies are in Theatres and stuff. I also have Windows Live Messenger, BBM, Ebay, Paypal, Facebook, Twitter, UberTwitter, CIBC Online, any other suggestions?