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

Eclipse OpenJ9: A Java Virtual Machine for OpenJDK that's optimized for small footprint, fast start-up, and high throughput. Builds on Eclipse OMR (https://github.com/eclipse/omr) and combines with…

Soot - A Java optimization framework

The official MongoDB drivers for Java, Kotlin, and Scala

JPHP - an implementation of PHP on Java VM

linear time regular expression matching in Java

Information about this project lives on the wiki

ECMAScript runtime for the JVM

UNIX domain sockets (AF_UNIX) for Java

This project has been absorbed by ruby-concurrency/concurrent-ruby

Jitescript - Java API for Bytecode

Rembulan, an implementation of Lua 5.3 for the Java Virtual Machine

Java port of a concurrent trie hash map implementation from the Scala collections library

Kahlua main development

maven plugin to handle rubygems in a maven way. including support for rspec, rails, cucumber, rake, etc

A Java DSL for binding method handles forward, rather than backward

A DFA regex engine in java.

Examples from my invokedynamic "deep dive" talk

Easy way to get started experimenting with the JDK Flight Recorder and the JMC core classes.

A simple dynamic language for the JVM

A Clojure Ref/STM plugin for JRuby

A wrapper around the "dex" tool from Android to use it as a library

A JRuby ext wrapping Clojure's data structs as efficiently as possible

A JRuby extension/wrapper around the Java 7 Fork/Join framework

The LogCompilation tool from OpenJDK, as-is.

Thor Hammer and a way to express invokedynamic in Java

A modified WeakRef impl for JRuby plus some weakref-related tools

A small library on top of ASM that generates optimistically typed bytecodes for dynamically typed JVM based languages