Ilya Zakhareich has ported GP/PARI (a mathematical - as opposed to engineering - calculations program/programming-language/C-library) to OS/2
ftp://ftp.math.ohio-state.edu/pub/users/ilya/os2/
BTW. developers will find there also e.g. ncurses 5.1plus, openssl 0.9.6, zlib 1.1.3 and
other things compiled for OS/2
Source: