Original website: https://web.archive.org/web/20140622071143/http://only.mawhrin.net/~alexey/fookb/
Fookb is Xkb state indicator. It can display an icon corresponding to current locked Xkb group. It also can switch Xkb groups.
A newer version may be available in the Window Maker dockapps git
git clone https://repo.or.cz/dockapps.git
(View in browser.)