Getting a smartphone. Seeking app recommendations.

I have a gingerbread android phone (Droid 3). But due to many reasons, I was unable/unwilling to use it with full potential. I have an Ipad too, but I literally use it only when I am doing exercising on a treadmill for web browsing.

 

 

But things have changed and I need a new smartphone now. So... after good amount of research and stuffs (wow, just when did Nokia go down? Weren't they no.1 in cellphone world?) I bought Samsung Galaxy S4 32gb Unlocked. It is coming tomorro...