Open Source Java Interpreters

MinGW: A native Windows port of the GNU Compiler Collection (GCC), with freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All of MinGW's software will execute on the 64bit Windows platforms.

CLIPS is a forward-chaining rule-based programming language written in C that also provides procedural and object-oriented programming facilities.

The home page for the Saxon XSLT 3.0, XQuery 3.1, and XPath 3.1 processor has moved to http://www.saxonica.com/. Information on this site is no longer kept up to date. Sourceforge was the home for open-source versions of the Saxon XSLT 3.0, XQuery 3.1, and XPath 3.1, processor from 1999 until 2022. From version 12.0 in January 2023, you need to visit the Saxonica site at http://www.saxonica.com/ for the latest information and releases.

The PHP script engine for Java. --- Run PHP applications within any J2EE server or servlet engine and/or connect script engines like PHP with Java or .NET back ends efficiently.

JamVM is a new Java Virtual Machine conforming to the JVM specification edition 2 (blue book). It is extremely small - stripped on PowerPC ~110K, Intel 80K. However, unlike other small VMs it supports the full spec, inc. object finalisation and JNI.

Jython is a Java implementation of the Python language. It allows users to compile Python source code to Java byte codes, and run the resulting bytecodes on any Java Virtual Machine. It is the successor to JPython.

NOTE: Yacas and yagy development has moved to github. The new repositories are located at https://github.com/grzegorzmazur/yacas and https://github.com/grzegorzmazur/yagy . The mailing list has been moved over to https://groups.google.com/forum/#!forum/yacas . The downloads section at sourceforge will be kept up to date for the foreseable future. Yacas is an easy to use, general purpose computer algebra system. It uses its own programming language designed for symbolic as well as arbitrary-precision numerical computations. The system comes with a library of scripts and extensive documentation. Yagy (http://sourceforge.net/p/yagy) provides full yacas experience wrapped in a simple and intuitive graphical interface.

Lsl Plus is an edit/compile/test environment for the Linden Scripting Language (LSL), implemented as an Eclipse plug-in.

Tcl/Java consists of two pieces of software. Jacl is an implementation of a Tcl interpreter written entirely in Java. Tcl Blend is a Tcl extension that provides access to Java from inside Tcl. One can prototype Java code using Tcl, and much more.

Community Z Tools Project (CZT): Tools for editing, typechecking and animating Z specifications and related notations. Includes a Java framework for building formal methods tools. NOTE: development of CZT has now moved to GitHub: https://github.com/community-z-users/czt

Lightweight, fast, Java-centric Lua interpreter written for JME and JSE, with string, table, package, math, io, os, debug, coroutine & luajava libraries, JSR-223 bindings, all metatags, weak tables and unique direct lua-to-java-bytecode compiling.

A MIPS processor modeled in Java for educational purposes and aimed at undergraduate Computer Architecture courses. It presently runs MIPS 32-bit R3000 ELF executables on any platform where Java itself will run. Five successively more sophisticated models of a pipelined MIPS RISC processor are included. Though the code is deliberately kept clear and simple in order that readers are able to figure out how a real processor works through the medium of the code, it will soon be able to run a real Linux O/S kernel compiled for MIPS in Java - at what speed we don't know!

SableCC is a parser generator which generates object-oriented frameworks for building compilers, interpreters and other text parsers. SableCC keeps a clean separation between machine and user code which leads to a shorter development cycle.

JBasic is a traditional BASIC language intepreter written in Java for command line or embedded use. It supports conventional original DOS and MSBASIC syntax, plus some modern extensions for supporting threads, JDBC, etc. JBasic can be run directly from a shell.

eXist-db is a native XML database featuring efficient, index-based XQuery processing, extensions for keyword search, XUpdate support, XSLT support, XForms support, REST and tight integration with existing XML development tools. Moved to Github - https://www.github.com/exist-db/exist

ESS-MODEL: The fastest and easiest to use UML reversing tool! With ESS-MODEL you can view class diagrams from your code in the time that other tools are still busy loading. Source is written in Delphi. More info: http://essmodel.sourceforge.net

CJam is a stack-oriented programming language heavily inspired from GolfScript and suitable for code golfing. It is an interpreted language, and the official interpreter is written in java.

An implementation of the language described in "Karel the Robot: A Gentle Introduction to The Art of Programming" by Richard Pattis et al. Both Java and C/Unix versions are available.

Un sistema de programación abierto, modular y flexible para fomentar las siguientes disciplinas: 1) programar para una interfaz, no para una implementación (GOF); 2) diseño por contrato; y 3) desarrollo dirigido por pruebas.

Lua interpreter for Android written in pure Java.

Jason is a fully-fledged interpreter for an extended version of AgentSpeak, a BDI agent-oriented logic programming language, and is implemented in Java. Using JADE a multi-agent system can be distributed over a network effortlessly. This project was moved to https://jason-lang.github.io

JoSQL (Java Objects SQL) provides SQL capabilities for querying, ordering and grouping of collections of Java objects (POJOs). It allows a SQL statement to be applied to the collection of objects and the matching set returned, ordered and grouped.

SISC is an extensible Java based interpreter of the algorithmic language Scheme. SISC uses modern interpretation techniques, and handily outperforms all existing Java interpreters (often by more than an order of magnitude).

jAMOS is a cross platform, Java-based reimplementation of François Lionet's AMOS BASIC on the Amiga.

RAVScript is designed as a procedural alternative to XSLT for XML to XML transformations. It is targeted at people with basic programming experience. It has similar syntax to Java (it is based on BeanShell), with some extensions to make transformation