The biggest software project I’ve been involved with is MOSFiT: the Modular Open Source Fitter for Transients. This code allows users to construct and fit semi-analytic light curve models to transient data, and is optimised for use with the Open Supernova Catalog
A paper describing the code is coming very soon, and the first results are presented in this paper.
This page also contains a few Python scripts that I’ve written and use a lot in my research. These are provided free for anyone who might find them useful!
Reduce FITS images using astropy tasks:
Carry out point-spread function fitting photometry: