Path on - a great way to add text to a photo in a very unique way.
PixIr - an app to fix up those photos that need to be retouched.You can also add effects or make a collage.
A word processing app that helps you spell words.
A word processing app that also has the capabilities to take a photo and change to text - not perfect, but better than nothing.
An app to get you writing if you are stuck on what to write about.