PowerTalk is a free add-on that provides text-to-speech for PowerPoint files, and it works brilliantly with the Tar Heel Reader books (see Tar Heel Reader in the English Language-Literature Section) when they are downloaded as PowerPoint files.

Find out more, and/or download at http://fullmeasure.co.uk/powertalk/.

PowerTalk Portable is also available and runs without any installation making it ideal for running off a USB stick.