MultiWeb is a World Wide Web browser that incorporates disability specific
technology suitable for computer users with multiple disabilities. It is
designed to be used without other adaptive software and includes a speech
engine, text enlargement, and scanning for switch devices.  

MultiWeb features various interfaces specifically designed to work with input
devices including mouse, keyboard, switch device and touch screen. Each
interface can be set-up with a number of different options including large
print, highlight text, small buttons, speech synthesis, talking buttons and a
variety of colors and fonts.  

http://mis.deakin.edu.au/multiweb/