What apps should I get for my Samsung Galaxy S2?

I just got an AT&T Samsung Galaxy S2 and this is the first time I have ever had a smartphone or android. I have been searching on Google for apps but much of it is outdated, such that old "tweaks" or apps are already incorporated into the latest Galaxy S2. What are some good/must have apps for... show more I just got an AT&T Samsung Galaxy S2 and this is the first time I have ever had a smartphone or android. I have been searching on Google for apps but much of it is outdated, such that old "tweaks" or apps are already incorporated into the latest Galaxy S2. What are some good/must have apps for entertainment and better yet, productivity or phone management (stuff that keeps the phone running smooth). Thanks.
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