K SOFT SEQuencer (ksoftseq) 1.13 had been ported:
GitHub: https://github.com/komh/ksoftseq
ksoftseq is a software sequencer for OS/2. ksoftseq enables you to play a midi file on OS/2 without any external programs.
If you would like to support this software you can make a donation at http://www.ecomstation.co.kr/komh/donate.html
By: KO Myung-Hun