Alternatives to Opa for all platforms with any license

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  • Node.js icon

    Node.js

    Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, perfect for...

    Open Source Mac Windows Linux BSD Self-Hosted

  • AngularJS icon

    AngularJS

    HTML is great for declaring static documents, but it falters when we try to use it for declaring dynamic views in web-applications. AngularJS lets you extend HTML vocabulary for your application. The resulting environment is...

    Open Source Mac Windows Linux Web / Cloud

  • Meteor icon

    Meteor

    Meteor is a set of new technologies for building top-quality web apps in a fraction of the time. It is built around Smart Packages: little bundles of code that can run on a client, inside a cloud service, or both, and that can manage...

    Open Source Mac Windows Linux

  • Polymer icon

    Polymer

    Polymer is a library that uses the latest web technologies to let you create custom HTML elements. Build anything from a button to a complete application as an encapsulated, reusable element that works across desktop and mobile.

    Open Source Mac Windows Linux

  • Derby icon

    Derby

    MVC framework making it easy to write realtime, collaborative applications that run in both Node.js and browsers.

    Open Source Mac Windows Linux

  • Koa icon

    Koa

    Expressive middleware for node.js using generators via co to make web applications and APIs more enjoyable to write. Koa's middleware flow in a stack-like manner allowing you to perform actions downstream, then filter and...

    Open Source Mac Windows Linux

  • Sails.js icon

    Sails.js

    Sails.js make it easy to build custom, enterprise-grade Node.js apps. It is designed to mimic the MVC pattern of frameworks like Ruby on Rails, but with support for the requirements of modern apps: data-driven APIs with scalable...

    Open Source Mac Windows Linux

  • KnockoutJS icon

    KnockoutJS

    Knockout is a JavaScript library that helps you to create rich, responsive display and editor user interfaces with a clean underlying data model. Any time you have sections of UI that update dynamically (e.g., changing depending on...

    Open Source Mac Windows Linux

  • FeathersJS icon

    FeathersJS

    Feathers is a real-time, micro-service web framework for NodeJS that gives you control over your data via RESTful resources, sockets and flexible plug-ins.

    Open Source Self-Hosted Node.JS

  • Aurelia icon

    Aurelia

    Aurelia is a JavaScript client framework that leverages simple conventions to empower your creativity.

    Open Source Mac Windows Linux Web / Cloud

  • Famous Engine icon

    Famous Engine

    The Famous Engine is a free and open source JavaScript rendering engine. What makes the Famous Engine unique is its JavaScript rendering engine and 3D physics engine that gives developers the power and tools to build native quality...

    Open Source Self-Hosted JavaScript

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  • Durandal icon

    Durandal

    Durandal is a cross-device, cross-platform client framework written in JavaScript and designed to make Single Page Applications (SPAs) easy to create and maintain.

    Open Source Mac Windows Linux

  • Harp Platform icon

    Harp Platform

    The Harp Platform is the easiest way for anyone to create an exceptional website. Landing Pages, galleries, blogs, e-commerce, domains, hosting, analytics, 24/7 support - all included.

    Open Source Mac Windows Linux

  • Harp icon

    Harp

    Harp is a production-ready web server. Rapidly build static sites and client-side applications using , and more—no configuration necessary.

    Open Source Mac Windows Linux

  • KnockbackJS icon

    KnockbackJS

    Both Knockout.js and Backbone.js have their strengths and weaknesses, but together they are amazing! With Knockback.js, you can use the strong ORM provided by Backbone and create dynamic views using Knockout bindings.

    Open Source Mac Windows Linux

  • total.js icon

    total.js

    Free web application framework for building Web sites and Web applications using JavaScript, HTML and CSS.

    Open Source Mac Windows Linux Web / Cloud

  • Pedestal icon

    Pedestal

    Pedestal is a web application framework written in Clojure that aims to bring both the language and its principles to client and server-side development.

    Open Source Mac Linux

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  • Chaplin icon

    Chaplin

    Chaplin is an architecture for JavaScript applications using the Backbone.js library. Chaplin addresses Backbone’s limitations by providing a lightweight and flexible structure that features well-proven design patterns and best...

    Open Source Mac Windows Linux

  • Ractive.js icon

    Ractive.js

    Ractive.js is different. It solves some of the biggest headaches in web development – data binding, efficient DOM updates, event handling – and does so with almost no learning curve.

    Open Source Mac Windows Linux

  • Mojo.JS icon

    Mojo.JS

    A non-opinionated, totally customizable JavaScript framework designed for writing programs that scale across any platform.

    Open Source Mac Windows Linux Web / Cloud

  • Twisted icon

    Twisted

    Twisted is an event-driven network programming framework written in Python and licensed under the MIT License. Twisted projects variously support TCP, UDP, SSL/TLS, IP Multicast, Unix domain sockets, a large number of protocols...

    Open Source Mac Windows Linux

  • Enyo icon

    Enyo

    Enyo is a JavaScript app framework enabling developers build native-quality HTML5 apps that run everywhere — from phones and tablets to PCs and TVs.

    Open Source Mac Windows Linux Android iPhone iPad

  • hapi icon

    hapi

    A rich framework for building web applications and services. hapi is a simple to use configuration-centric framework with built-in support for input validation, caching, authentication, and other essential facilities. hapi enables...

    Open Source Mac Windows Linux

  • Gem.js icon

    Gem.js

    Gem.js gives you a way to create modular, composable web components and modular, composable styles in pure-javascript. It also includes a set of extensible web components for building visual user interfaces and styling web...

    Open Source Mac Windows Linux Web / Cloud

  • MontageJS icon

    MontageJS

    MontageJS is a modern, full stack HTML5 framework designed to create single-page applications—fast! MontageJS uses time-tested design patterns and software principles, allowing you to easily create a modular architecture for your...

    Open Source Mac Windows Linux

  • flatiron icon

    flatiron

    flatiron is an adaptable framework for building modern web applications. It was built from the ground up for use with Javascript and Node.js.

    Open Source Mac Windows Linux

  • Serenade.js

    Serenade.js is a client side framework built on the MVC pattern. It makes it simple to create rich client side applications by freeing you from having to keep the DOM up to date with your data through powerful data bindings. ...

    Open Source Mac Windows Linux

  • intercooler.js icon

    intercooler.js

    Simple, declarative AJAX using HTML attributes

    Open Source Mac Windows Linux

  • Thorax

    An opinionated, battle-tested Backbone + Handlebars framework to build large scale web applications.

    Open Source Mac Windows Linux

  • DOMtastic

    Small & fast DOM and event library for modern browsers. Having the same familiar API as jQuery (but without the extra "weight" of modules like $.ajax, $.animate, and $.Deferred), it works great stand-alone or paired up...

    Open Source Mac Windows Linux

  • V8cgi

    v8cgi is a server side (FastCGI or Apache module) and client side shell/batch scripting language. It's based on Google's V8 JavaScript implementation. It's available under an Open Source BSD license. It currently runs...

    Open Source Windows Linux

  • AmplifyJS icon

    AmplifyJS

    AmplifyJS is a set of components designed to solve common web application problems with a simplistic API. Amplify's goal is to simplify all forms of data handling by providing a unified API for various data sources. Amplify's...

    Open Source Mac Windows Linux

  • Flight icon

    Flight

    A lightweight, component-based JavaScript framework for assigning behavior to DOM nodes.

    Open Source Mac Windows Linux

  • Nombo icon

    Nombo

    Nombo is an Open Source Node.js framework that allows you to easily build Rich Cloud Applications.

    Open Source Mac Windows Linux

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