GraalVM is a project based in Oracle Labs developing a new JIT Compiler and Polyglot Runtime for the JVM. Further details can be found on the OTN site.

• Graal SDK contains long term supported APIs of GraalVM.

• Graal is a dynamic compiler written in Java that integrates with the HotSpot JVM.

• Truffle is a framework for implementing languages and instruments that use Graal as a dynamic compiler.

• Tools contains a set of tools for Truffle guest languages implemented using the instrumentation framework.

• Substrate VM is a framework that allows ahead-of-time (AOT) compilation of Java applications under closed-world assumption into executable images or shared objects.

Truffle and its dependency Graal SDK are licensed under the GPL 2 with Classpath exception.

The Tools project is licensed under the GPL 2 with Classpath exception.

The Graal compiler is licensed under the GPL 2.

The Substrate VM is licensed under the GPL 2.