Where you go for

AForge.NET

Open source C# framework for computer vision and AI.

MLBase.jl

Essential machine learning tools for Julia.

ml.js

Comprehensive browser-based machine learning library in JavaScript.

mlpack

Fast, header-only C++ machine learning library.

Mlxtend

Python library for day-to-day data science and ML utilities.

Patern Recognition and Machine Learning Toolbox

Open-source toolbox for pattern recognition and machine learning algorithms.