galsim (conda): GalSim is open-source software for simulating images of astronomical objects (stars, galaxies) in a variety of ways. The bulk of the calculations are carried out in C++, and the user interface is in python. In addition, the code can operate directly on "config" files, for those users who prefer not to work in python. (http://adsabs.harvard.edu/abs/2015A%26C....10..121R)
Keywords: astronomy|c-plus-plus|des|euclid|galaxy|lsst|python|simulate-images|simulation|weaklensing|wfirst