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JikesTM is a compiler for the JavaTM language. The Jikes project strives for strict adherence to the Java Language and Java Virtual Machine Specifications. Jikes' most popular feature is it's extremely fast compile speed.
TransJVM is a Java package to assist compiler writers targeting the Java Virtual Machine. It provides a simple logical interface for creating JVM classes, expressed in terms of Methods, Fields, Statements and Expressions. JVM details are hidden.
The goal of VMKit is to create a body of code useful for creating and experimenting with virtual machines. The code will emphasize modularity, clarity, correctness, and portability in no particular order but all taking precedence over execution speed.
M is a capability-based language in the Java framework for distributed, secure, persistent, extensible virtual worlds. The project also supports JCC, a Java-based hybrid constraint programming language. This project is also being used for work on TCC and its extensions.
Model implementation for the BaSa language, a Turing-like language. This simple language is to be run in a virtual machine.
The proposed language specification is defined in http://www.cs.ui.ac.id/kuliah/IKI40800/model.html
Janux is a project to port the java virtual machine directly on top of the Linux kernel using
bypassing the traditional posix enviroment. This results in very fast java implementation for linux and and opportinuty to develop java based operating syste
Djarva - object language, compiler and virtual machine
Djarva is object language inspired by Ruby and Java languages. Djarva project includes Djarva language, Djarva language to Djarva bytecode compiler and Djarva virtual machine accepting Djarva bytecode. Whole solution is implemented in the Java language. Djarva compiler is based on JKIT (see http://homepages.ecs.vuw.ac.nz/~djp/jkit/).