Nitro provides a library of carefully designed middleware and utilities for creating scalable, standards-compliant Web Applications with JavaScript.Nitro is build on top of Jack / JSGI, Narwhal / CommonJS and Rhino.

Cappuccino is an open source framework that makes it easy to build desktop-caliber applications that run in a web browser.

JavaScriptMVC is an open-source framework containing the best ideas in enterprise JavaScript development. It guides you to successfully completed projects by promoting best practices, maintainability, and convention over configuration.

A pure-JavaScript CSS selector enginedesigned to be easily dropped in to a host library.

Downloaded 10/22/2009

Installed 11/8/2009

ExplorerCanvas

Envjs is a simulated browser environment written in javascript. It was originally developed by John Resig and discussed in his blog here . Envjs is now supported by a community of developers who all use Envjs as part of their own open source projects.

Web Workers allow you to run JavaScript in parallel on a web page, without blocking the user interface.

Jack is a collection of JSGI compatible handlers (connect web servers to JavaScript web application/frameworks), middleware (intercept and manipulate requests to add functionality), and other utilities (to help build middleware, frameworks, and applications).

JSGI

Chiron is a system of interoperable JavaScript modules. Chiron modules conform to the "securable, interoperable JavaScript modulespecification" [1]. Chiron also provides a compliant module loader for web browsers. This project strives to provide a coherent set of general purpose modules for both client and server, and secure and non-secured environments.

Narwhal is a cross-platform, multi-interpreter, general purpose JavaScript platform. It aims to provide a solid foundation for building JavaScript applications, primarily outside the web browser. Narwhal includes a package manager, module system, and standard library for multiple JavaScript interpreters.

Helma NG stands for Helma Next Generation and is a version of Helma built from the ground up. The main differences between Helma 1 and Helma NG are that Helma NG has a much smaller and leaner Java core (mostly just runtime, shell, and the module and resource loader), and that Helma NG aims to provide full CommonJS interoperability.

Javascript bindings for C++, a Javascript interpreter and shell, and a Javascript/C++ module system.

Java

SpiderMonkey is the code-name for the Mozilla's C implementation of JavaScript.

V8 is Google's open source JavaScript engine. V8 is written in C++ and is used in Google Chrome, the open source browser from Google.

Mozilla ActionMonkey

Mozilla Tamarin