  UltraNest is a general-purpose Bayesian inference package for parameter
estimation and model comparison. It allows fitting arbitrary models specified
as likelihood functions written in Python, C, C++, Fortran, Julia or R. With a
focus on correctness and speed (in that order), UltraNest is especially useful
for multi-modal or non-Gaussian parameter spaces, computational expensive
models, in robust pipelines. Parallelisation to computing clusters and resuming
incomplete runs is available.
