Disabled World has compiled a list of VoiceOver apps that are compatible with iPhones and Macs.
“If you’re blind or have low vision, you can enjoy the simplicity, security, and reliability of the Mac using VoiceOver. It’s built into the Mac OS X operating system that comes with every new Mac and sets a new standard for screen readers. VoiceOver also includes support for many Braille displays for those who are both blind and deaf. In addition, VoiceOver includes features for those that cannot use the mouse, such as keyboard based navigation.”