Julia
Julia is a fast and user-friendly programming language for high-performance scientific computing.
PyMC3
PyMC3 is a Python-based statistical modeling tool for Bayesian statistical modeling and Probabilistic Machine Learning which focuses on advanced Markov chain Monte Carlo and variational fitting algorithms.
Stan
Stan is a platform for Bayesian modeling, inference, and visualization on the frontiers of applied statistics.
nteract
nteract is a stand-alone desktop application for developing computational notebooks. nteract allows users to craft narratives involving text, code, images, and data on the desktop rather than through a web application.
IPython
IPython is an enhanced interactive Python environment aimed at maximizing productivity in workflows that combine data, computation and exploratory programming. It gave rise to the larger, cross-language Project Jupyter, and it continues to provide the default Python environment for the Jupyter platform.