JDK main-line development https://openjdk.org/projects/jdk

GraalVM compiles applications into native executables that start instantly, scale fast, and use fewer compute resources 🚀

Quarkus: Supersonic Subatomic Java.

The missing Java distribution of native C++ libraries

ActiveJ is an alternative Java platform built from the ground up. ActiveJ redefines core, web and high-load programming in Java, providing simplicity, maximum performance and scalability

An Intuitive Event-Driven Reactive Programming Library for Java

The New Official Aparapi: a framework for executing native Java and Scala code on the GPU.

Polyglot CUDA integration for the GraalVM