Quote from slickpick:
No one in their right mind is going to build a proper OMS/EMS and release it open source.
It sounds like you're using IB, given what's offered (IB Java API/FIX) you should be able to piece something together yourself.
that's currently what I am doing, putting together something based on the IB Java API
I disagree on the possibility of building an opensource OMS, the incentive doesn't have to be about the monetization of such a platform, like METC has tried to do.