Just a few that I use regularly...
Tapatalk - for reading JI while taking a sh1t.
IMDB
SportsTap and ScoreMobile - pretty much every sport
reddit
Netflix
HBO Go
If you happen to have Verizon FiOS, get FiOS Remote. My wife still has no idea why the channel changes in the middle of any Real Housewives show.
Oh, return the iPhone and get a Samsung Galaxy S3.