vʌvr (formerly called Javaslang) is a non-commercial, non-profit object-functional library that runs with Java 8+. It aims to reduce the lines of code and increase code quality.

FlatLaf - Swing Look and Feel (with Darcula/IntelliJ themes support)

Functional programming in Java

An advanced, but easy to use, platform for writing functional applications in Java 8.

Create your own auto-update framework

A scientific charting library focused on performance optimised real-time data visualisation at 25 Hz update rates for data sets with a few 10 thousand up to 5 million data points.

Java 8 annotation processor and framework for deriving algebraic data types constructors, pattern-matching, folds, optics and typeclasses.

Java library for talking to serial ports (with added build support for maven, cmake, MSVC)

Metawidget is a smart User Interface widget that populates itself, either statically or at runtime, with UI components to match the properties of your business objects.

Assorted functional-oriented data structures and algorithms for Java.