DMDScript - Implementation of ECMA 262 scripting language; standalone and ActiveScript versions available. By Digital Mars. JSLibs - Standalone JavaScript development environment. Goals: turn JavaScript into a general-purpose scripting language. Has a set of native modules that contains many general-purpose classes and functions. Open source, GPL. GPSEE - An open-source project for developing and running CommonJS programs, enhancing existing programs using SpiderMonkey's JSAPI, and adding interoperability between JSAPI projects. OpenJDK: Nashorn - Implement a lightweight high-performance JavaScript runtime in Java with a native JVM. BrendanEich/narcissus - JavaScript interpreter written in pure JavaScript (i.e., a meta-circular evaluator), using the SpiderMonkey engine. js-test-driver - Remote JavaScript console. SpiderMonkey - Mozilla's JavaScript engine written in C/C++. It is used in various Mozilla products, including Firefox, and is available under the MPL2. JSDB - JavaScript for databases, a scripting language for data-driven, network-centric programming on Windows, Mac, Linux, and SunOS. It is free and open-source. Use it as a JavaScript shell, to run CGI programs, or as a web server. JavaScript Shell Extended - A command-line interface for JavaScript and DOM. Mozilla: xpcshell - An XPConnect-enabled JavaScript Shell. It is a console application that lets run JavaScript code. Unlike the ordinary JS shell (js), xpcshell lets the scripts running in it access XPCOM functionality. Introduction to the JavaScript Shell - SpiderMonkey - The JavaScript shell (js) is a command-line program included in the SpiderMonkey source distribution. It is the JavaScript equivalent of Python's interactive prompt, the Lisp read-eval-print loop, or Ruby's irb. The article explains how to use the shell to experiment with JavaScript code and run JavaScript programs. JSPL - A bridge between Perl and JavaScript (the SpiderMonkey engine specifically). JSPL makes it easier for JavaScript programmers to write stand-alone, out-of-the-browser, applications. GLUEscript (Glueing Libraries Using EcmaScript) - The successor of wxJavaScript. The goal of this project is to create a JavaScript engine which can be used as a general purpose language (like Perl for instance). JavaLikeScript - A general-purpose JavaScript platform. It aims to provide an extensible tooling framework. Can be used for various purposes including client-side, server-side or desktop scripting. Comes in two parts: a low level set of native libraries and a set of JavaScript libraries. Rhino - An open-source implementation of JavaScript written entirely in Java. Nombas - All about Nombas, the scripting company that no longer exists. Tamarin - JavaScript engine written in C++. Implements Adobe ActionScript 3 (a superset of ECMAScript Edition 3) and is embedded within the Adobe Flash Player versions 9 and later. BESEN - Complete open-source ECMAScript Fifth Edition implemention in Object Pascal [Delphi/FreePascal] V8 JavaScript Engine - A blog by the team for the JavaScript engine of the Chromium platform.