Here are the Python code files and documentation for IPFP solvers for more variants of the Choo and Siow model (without singles, and heteroskedastic).
My coauthor Alfred Galichon (NYU) and Keith O’Hara (Amazon) have developed the TraME library: a set of procedures for Transportation Methods for Econometrics. It allows the user to estimate a much broader class of models. TraME is available on Github. Here are some more specific links: