Built-in Feature: iPod Touch (4th Gen)

VoiceOver : Screen reader / text to speech

Gesture-based screen reader. Touch screen to hear an item’s description, gesture with double tap, drag or flick. The user can modify the speaking rate, the speech’s voice, pronunciations and pitch, verbosity, braille, audio, rotor, rotor actions, typing style, phonetic feedback, typing feedback, modifier keys, enable “Always Speak Notifications”, navigate images, enable “Large Cursor”, or double-tap timeout.

Detailson: VoiceOver : Screen reader / text to speech
Built-in Feature: iPod Touch (4th Gen)

White on Black : Reverse video

Reverse-video works in all applications and on the Home, Lock, and Spotlight screens. Can be used with Zoom and VoiceOver.

Detailson: White on Black : Reverse video
Built-in Feature: iPod Touch (4th Gen)

Zoom : Magnify

Lets you magnify the entire screen of any application you’re using to help you see what’s on the screen. The user can also enable “Follow Focus”, “Smart Typing”, and “Show Controller.” The user can modify zoom region, zoom filter, and maximum zoom level.

Detailson: Zoom : Magnify