RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.

OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)

Desktop/Android/HTML5/iOS Java game development framework

Tiny, easily embeddable HTTP server in Java.

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.

Roadmap to becoming a Java developer in 2026

Java bindings for Skia

Expose eclipse features inside of vim.

a pug implementation written in Java (formerly known as jade)

Реализация сайта на Spring MVC и логгирования сайта на Spring AOP