Here we describe the general architecture of the framework and its features, and demonstrate its ability to both assess the performance of three common small molecule force fields (OpenFF 1.0.0 , GAFF 1.8 and GAFF 2.1 ) as well as train the non-bonded vdW parameters of the OpenFF 1.0.0 force field against data sets of physical property data curated using the framework's tools.