Yes there are programs that help the disabled Communicate but now the Tablet Revolution has brought an affordable option, See Jump.
@TatWza

EyeTech Digital Systems enlisted the help of some BYU engineering students to make this eye-tracking Windows 7 tablet is only $1500 compared to the previous affordable which was around $6900. I can’t front, my lazy ass could use this to post up My Tech Post! But I worry about something SO important on a Windows Tab.