EMCEE (Foreman-Mackey et al.) is an affine-invariant ensemble sampler: available from the EMCEE website or at github. There is also a paper.

Laura Watkins works with this code – ask if you have questions.

Info on other MCMC methods coming soon…..

To install MultiNest: https://github.com/JohannesBuchner/MultiNest

The python wrapper PyMultiNest, and installation instructions can be found here: https://github.com/JohannesBuchner/PyMultiNest.

This paper describes the code and some test examples.

See tutorial.