Pyke introduces a form of Logic Programming (inspired by Prolog) to the Python community by providing a knowledge-based inference engine (expert system) written in 100% Python. Unlike Prolog, Pyke integrates with Python allowing you to invoke Pyke from Python and intermingle Python statements and expressions within your expert system rules.

pHash is an open source library released under the GPLv3 license that implements several perceptual hashing algorithms and provides a C++ API to use those functions in your own programs.

bondi (pronounced "bond-eye") is a programming language centred on pattern-matching . It supports functional, imperative, query-based and object-oriented programming styles using a single small evaluator.

A general object-oriented pattern matcher for Python, based on Alessandro Warth's OMeta.

NuPIC implements a hierarchical temporal memory system (HTM) patterned after the human neocortex. We expect NuPIC to be used on problems that, generally speaking, involve identifying patterns in complex data. The ultimate applications likely will include vision systems, robotics, data mining and analysis, and failure analysis and prediction.