Suqoku v0.6.4 (2012/05/30) is available for OS/2 and eComStation.
Suqoku is a sudoku game written in Qt 4.
This port requires the Qt 4 libraries and libc libraries.
Link: ftp://ftp.netlabs.org/pub/qtapps/Suqoku-0.6.4-os2.zip
Web: http://www.konarski-wuppertal.de/andreaskw/Suqoku.html
Port by Elbert Pol