the Japanese Society for the Rehabilitation of Persons with Disabilities has produced a free self-voicing program called ALTAIR.
ALTAIR is a free program designed for blind, low vision or deaf-blind users. ALTAIR is a text editor, web browser and e-mail client with built-in speech synthesizer and can output to a Braille display. Font size can be enlarged and font and background color can be changed for people with low vision.
With ALTAIR, persons with visual impairments and people who are deaf-blind can read content effectively on the Internet. ALTAIR can import files from Word, Excel PowerPoint and PDF. The program is available in English and Japanese.
Click this link to visit the English homepage of ALTAIR for Windows. You will be asked if you want to install the Japanese language pack for Windows. Simply choose cancel to abort installation.