iphone and ipad app for emails that supports colors, fonts, etc
I do this so seldom, that I use another editor to compose what I need and then copy/paste. On the iPad, you have split screen so you can edit in one larger pane and then compose the main in a smaller pane.

Here are my editing apps of choice:


Notes - free and powerful
Coda - HTML powerhouse
GoodNotes - more for note taking, but handwriting to text is so awesome, I had to include it
Drafts - pure writing power
Pages - also free and powerful


Each has different strengths.