Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
iPhone has plenty of decent photo editing apps. Some good ones like Snapseed and Camera Plus Pro really help a lot for enhancing picture along with adding filters, borders etc.

Hope it helps.:)
 
iPhoto for iOS does what you mention and more and will eat up multiple formats

p1355354616-4.jpg
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.