1) Logos - best Bible app available if you have bought the computer software. It gives me access to over 1400 books/Bibles/commentaries/dictionaries etc on my iPad. Plus it does highlighting and note taking now.
2) Appshopper - if you are one of those people that buy a $500 item and then cringe at the thought of handing over 99 pennies for a quality app, this is not for you. But for the rest, it simply can't be beat for value. First you can get it free (I got paid version to show developer how much i love it). Second, you just make a list of apps you want and instead of paying $12 for them, i get almost all my apps for free or 99 cents. Of course you also have to have a little patience.
3) Modern Warfare 3 - amazing graphics and again only 99 cents.
4) Shredder Chess - best chess app in my opinion
5) Galaxy of Fire 2 HD - amazing sci fi shooter with retina graphics.