Heurix.io - Heurix is a free heuristic evaluation tool that helps you work out how to improve your website.
Scikit-learn - scikit-learn (formerly scikits.learn) is an open source machine learning library for the Python programming language.
UX Companion - A handy glossary of UX theories, tools and principles (iOS)
Pandas - Pandas is an open source library providing high-performance, easy-to-use data structures and data analysis tools for the Python.
Heurio - Do website reviews faster. Heurio eliminates the administration process and lets you focus on creating value in a collaborative and user-friendly way. Perfect for heuristic evaluation, design and development review, bug report, QA testing and more.
NumPy - NumPy is the fundamental package for scientific computing with Python