“OpenDyslexic is a new open sourced font created to increase readability for readers with dyslexia. The typefaces includes regular, bold, italic and bold–italic styles. It is being updated continually and improved based on input from dyslexic users. There are no restrictions on using OpenDyslexic outside of attribution.”
This font is an open-source version of the Dyslexie font developed by Christian Boer.
There is also a web browser app for the iPad called openWeb that overrides a site’s default font and displays text in the Open-Dyslexic font.