A nice feature to roll out in the latest release of BlackBerry 10.2 is the screen reader.
This is an accessibility tool to aid visually impaired users by reading the text on screen. The tool is really easy to activate - just tap on the power button three times and then you'll be prompted to use it.
Tap 3 times again and you can turn off the reader. This is helpful as some gestures don't work while the reader is activated.