A Java client library and an Android app to access more than 1,000 public and scientific libraries from all over the world.
A new scientific chemistry library for java.
A MATLAB like user friendly scientific programming environment that uses Groovy as a scripting engine together with JShell of Java 9+ and exploits a large number of Java scientific libraries. Also, JShellLab is a similar environment that emphasizes on Shell based scripting: https://github.com/papdim/JShellLab
Java Machine Learning Library
A list of useful Java frameworks, libraries, software and hello worlds examples