David Bakhash's excellent
strokes package for
Emacs /
XEmacs lets you bind
gestures (called "strokes") to Emacs commands. Define the up and down strokes to mean
scroll-down and
scroll-up, a script
S to save you files, a circle to
compile.
Strokes are expressed by click-dragging with the middle mouse button. You can also define disconnected strokes with the right mouse button (these require a separate button press to tell Emacs you've finished entering them).
Originally it was meant to let you type in characters for languages from the Far East.