Poster
A beautiful, feature-rich WordPress client for iPad and iPhone. In addition to being able to use OpenDyslexic in a non-distracting interface, it also supports DropBox, MarkDown, TextExpander and more.
Get it: http://appstore.com/poster/
Website: http://www.tomwitkin.com/poster/
Clicker
[caption id="attachment_312" align="aligncenter" width="1024"] Clicker 6 with OpenDyslexic[/caption]
Clicker is word processor that helps children learn to read and write. It has many unique features, including speech feedback, word prediction, pictures to write with, and the Sassoon font. OpenDyslexic is also available as an add-on.
iReadWrite
[caption id="attachment_256" align="aligncenter" width="500"] iReadWrite font selection screen[/caption]
An excellent literacy tool with many features to help those that struggle with their reading and writing. It's super customizable, includes dictionaries and a phonetic spell checker to help catch common mistakes.
Texpad
Texpad is a LaTeX editor for the iPad and iOS that includes auto-complete, outline view, error tables, and now, OpenDyslexic.
Get it: http://texpadapp.com
Spell Better
Free to try app that helps with spelling, and includes OpenDyslexic
Get it: http://navanitarakeri.com/spellbetter/
Wordsmith
[caption id="attachment_171" align="aligncenter" width="1043"] WordSmith shown with the Irving theme that uses OpenDyslexic[/caption]
Abilipad
Abilipad is a writing tool with custom keyboards, and more.
Get it: http://appytherapy.com