The machine learning library for Apache Spark, providing scalable algorithms and tools for ML pipelines.

The Waikato Environment for Knowledge Analysis (WEKA), a machine learning workbench. This version represents the developer version, the "bleeding edge" of development, you could say. New functionality gets added to this version.

A library helps deploy machine learning models on mobile devices

DeepLearning4j Core

TensorFlow for Java: A software library for machine intelligence.

The Waikato Environment for Knowledge Analysis (WEKA), a machine learning workbench. This is the stable version. Apart from bugfixes, this version does not receive any other breaking updates.

High performance scientific and technical computing data structures and methods, mostly based on CERN's Colt Java API

ClearTK machine learning library and interfaces

Encog Machine Learning Framework.

Main package of JDMP containing machine learning algorithms and functions