Code
celmech
celmech is a Python package that provides a number of celestial mechanics tools. The code is designed to interface easily with the REBOUND N-body code. The code can be installed by cloning the GitHub repository.
ttv2fast2furious
ttv2fast2furious is a code designed for modeling transit timing variations in order to infer planet massees and eccentricities. The code can be installed by cloning the GitHub repository or installed through pip.