Hello everyone.
What are the free available forcefield fitting softwares/tools, which go along well with ORCA? I have done the quantum level calculations with Orca, now I need to fit the parameters for nonbonded buckingham/coulomb, bonded, angle bending, torsional, and improper fitting. I have used Multiwfn to fit partial atoms. I prefer to use Dreiding/Opls aa style forcefield for fitting.
Thanks