VoiceOver gives you auditory descriptions of each onscreen element and provides helpful hints along the way — whether you prefer using gestures, a keyboard, or a braille display.
Screader is a screen reader based on the Screen package. It reads the Linux virtual console screen and puts it through to a speech synthesizer without disturbing the running process.
ChromeVox is a free screen reader that brings the speed, simplicity, and security of Chromebooks to users who have visual limitations. ChromeVox comes pre-installed on Chromebooks so there’s nothing to do besides turning it on.