Information:
Xruskb allows switching of two keyboard layouts
on any particular key combination, e.g. two shifts.
It maintains a small window with current state indicator.
It can also serve as autolock. This all is done via
catching keyboard and mouse X events from (almost) all
windows. Has Motif, Xaw and bare compilation modes,
extensive tuning by X resources. State indicator can
be placed in WindowMaker's appicon.