Digger had been ported to OS/2 and eComStation (2012/06/22).
http://hobbes.nmsu.edu/h-search.php?key=digger.zip
"Digger is a game originally created by Windmill software in 1983 and remastered by Andrew Jenner in 1998. Licensed under the GNU GPL license. "
Project URL: http://www.digger.org
Port by: Andrey Vasilkin