A Linux kernel module that simulates key presses without pressing any keys, in this module i press the left key whenever the user presses any key, so that he writes from right to left instead of writing from left to right.
pyneo-zadosk is a simple but highly configurable on-screen-keyboard. it uses libfakekey. it's written in python and is usable as stand-alone program or as module imported in a python app. it's output is based on GTK (currently python-gtk2 but will soon migrated to use gir).
FvwmKb is a module for Fvwm and Scwm window managers that makes it more comfortable to work with several Xkb keyboard layouts. For the focused window it stores the currently locked Xkb group (keyboard layout) in its internal database and restores it when