Original website: http://www.goesgens.de/wmkeys.html
wmkeys is a Window Maker and AfterStep dock app which allows you to quickly switch between different X keymaps, for example QWERTY and Dvorak. The source includes QWERTY and Dvorak keymappings. Other keymappings can be made with JWZ’s xkeycaps.
For comments, see the original dockapps.org entry.
A newer version may be available in the Window Maker dockapps git repository:
git clone https://repo.or.cz/dockapps.git