Description:

Dasher is an information-efficient text-entry interface, driven by
natural continuous pointing gestures. Dasher is a competitive
text-entry system wherever a full-size keyboard cannot be used - for
example, on a palmtop computer; on a wearable computer; when operating
a computer one-handed, by joystick, touchscreen, trackball, or mouse;
when operating a computer with zero hands (i.e., by head-mouse or by
eyetracker). The eyetracking version of Dasher allows an experienced
user to write text as fast as normal handwriting - 25 words per
minute; using a mouse, experienced users can write at 39 words per
minute.