Distintas JVM

• jamvm
• JamVM is an open-source Java Virtual Machine that aims to support the latest version of the JVM specification, while at the same time being compact and easy to understand. 
• ZeroShark
• Zero is an interpreter-only port of OpenJDK that uses no assembler and therefore can trivially be built on any Linux system. 
• dcevm
• This project is a fork of original DCEVM project. The purpose of the project is to maintain enhanced class redefinition functionality for OpenJDK HotSpot 7/8 and Oracle JVM.
• http://openjdk.java.net/jeps/159