Bywater BASIC Interpreter 2.50 is available for OS/2 and eComStation (2012-06-18)
"A simple open-source BASIC interpreter, packed with a series of example BASIC programs.
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Link: http://hobbes.nmsu.edu/h-search.php?key=bwbasic_os2.zip
URL: http://sourceforge.net/projects/bwbasic/
It requires kLIBC / GCC Runtime Library.
By Mentore Siesto