"Dasher is an input method and computer accessibility tool which enables users to write without using a keyboard, by entering text on a screen using a pointing device such as a mouse, a touchpad, a touch screen, a roller ball, a joystick, a Push-button, a Wii Remote, or even mice operated by the foot or head."
Hard to tell how much success it ever had in terms of adoption, although I could imagine there may be users out there who find it invaluable. Certainly worth a look though as it gives a very nice visualisation of the text prediction algorithm as it goes.
http://en.wikipedia.org/wiki/Dasher_(software)
"Dasher is an input method and computer accessibility tool which enables users to write without using a keyboard, by entering text on a screen using a pointing device such as a mouse, a touchpad, a touch screen, a roller ball, a joystick, a Push-button, a Wii Remote, or even mice operated by the foot or head."
Hard to tell how much success it ever had in terms of adoption, although I could imagine there may be users out there who find it invaluable. Certainly worth a look though as it gives a very nice visualisation of the text prediction algorithm as it goes.