RubyJS - A JavaScript Standard Library Based On The Ruby Core-Lib

RubyJS is a JavaScript implementation of all methods from Ruby classes like Array, String, Numbers, Time and more.  RubyJS is free for personal use only.

Features

• 100% JavaScript - RubyJS is built on top of JavaScript. It runs in all browsers. No additional tools needed.
• Works Like Ruby - Easily port code from Ruby to JavaScript. Become productive in JavaScript in hours. Fully tested with rubyspec.
• Fast And Small - 20 kilobytes minified and gzipped. It is as fast or faster than comparable libraries.
• Utility Belt Or OO - Use RubyJS like a utility belt, transforming arrays, string and continue with native objects. Or use the fully-fledged RubyJS objects and make use of their mutator (aka bang) methods.
• All-In-One Library - String, Array, Time, Numbers, Range, and more. RubyJS gives you the power of multiple 3rd party libraries, with one coherent API. So you only have to learn, manage and update one.
• Ruby Features - Block arguments, destructive (bang-) methods, duck-typing, special variables, mixins.

Requirements: None
Demo: https://github.com/rubyjs/core-lib
License: AGPL

RailwayJS - An MVC Framework To Create Node.js Web Apps Faster With More Energy

RailwayJS is the Node.js MVC framework based on Express.js, fully Express.js compatible.  It allows you to build web applications in a similar manner as in Ruby On Rails.  The main objective of the framework - web development without pain.

Features

• Full MVC+H stack
• Resource-based routing
• JugglingDB ORM
• Multi-locale support
• Coffee-script support (howto)
• Generators for model, controller, scaffold
• Testing: nodeunit, cucumis, code coverage reporting
• Debugging: railway console
• Extensions

Requirements: Node.js
Demo: http://railwayjs.com/
License: MIT License

Entity.Js - A JavaScript Game Engine For HTML5

Entity.js is an awsome all new javascript game engine. It focuses on flexibility, reusability and robustness. To make this happen Entity utilizies the, entity-component design where all logic is implemented in components and entities are created from adding or removing components. Its supported on all major browsers and will be coming to mobile devices soon.

Requirements: Ruby
Demo: http://entityjs.com/games
License: MIT License