foldamers (https://github.com/shirtsgroup/foldamers) – Provides tools to model the thermodynamic properties of non-biological oligomers/polymers.
cg_openmm (https://github.com/shirtsgroup/cg_openmm) – Provides tools to build coarse grained models for biomimetic and non-biological polymers, and perform dynamical simulations with OpenMM.
For an up-to-date list of software contributions see my github profile: https://github.com/garrettameek.