Barnes and Noble's Nook Study was designed for downloading and reading eBooks purchased from Barnes and Noble, but it can also read PDFs. You have to register to download the software, but it is free to use. Simply use the Add Item facility to copy the PDF from your computer to the Nook Study library. If you open the document, it will appear with its PDF formatting intact in the Nook Study reader. Individual words are highlighted with an orange block when they are read. It uses the default voice on the computer - Heather in the case of my laptop.

CTRL-ALT-S activates speech, then the following commands are available:

• H - Help
• Space - Start / Stop Reading
• P - Start Page Over
• A - Go Back one sentence
• S - Restart current sentence
• D - Skip to next sentence
• R - Last phrase
• W - Currently focused element

Far from perfect, but a lot better than the Adobe Read Outloud facility, for reading PDFs if a school / parent hasn't got Read and Write Gold / PDFaloud / ClaroRead.

I had hoped that it could be used for digital exams, but the facility for typing into forms seems to have been disabled, though you can type into sticky notes.