Alternatives to Opa for all platforms with any license





Web / Online


Other Platforms

  • Node.js icon


    Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications. Node.js...

    Open Source Mac Windows Linux Self-Hosted

  • AngularJS icon


    HTML is great for declaring static documents, but it falters when we try to use it for declaring dynamic views in web-applications....

    Open Source Mac Windows Linux Web / Cloud

  • Meteor icon


    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:...

    Open Source Mac Windows Linux

  • Polymer icon


    Polymer is a library that uses the latest web technologies to let you create custom HTML elements. Build anything from a button to a...

    Open Source Mac Windows Linux

  • Derby icon


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

    Open Source Mac Windows Linux

  • ExpressJS icon


    Fast, unopinionated, minimalist web framework for Node.js Express is a project of the Node.js Foundation Source code :...

    Open Source macOS Windows Linux JavaScript Node.JS

  • KnockoutJS icon


    Knockout is a JavaScript library that helps you to create rich, responsive display and editor user interfaces with a clean underlying...

    Open Source Mac Windows Linux

  • Sails.js icon


    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...

    Open Source Mac Windows Linux

  • FeathersJS icon


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

    Open Source Self-Hosted Node.JS

  • Aurelia icon


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

    Open Source Mac Windows Linux Web / Cloud

  • Koa icon


    Expressive middleware for node.js using generators via co to make web applications and APIs more enjoyable to write. Koa's...

    Open Source Mac Windows Linux

  • Durandal icon


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

    Open Source Mac Windows Linux

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  • 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...

    Open Source Mac Windows Linux

  • Harp icon


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

    Open Source Mac Windows Linux

  • KnockbackJS icon


    Both Knockout.js and Backbone.js have their strengths and weaknesses, but together they are amazing! With Knockback.js, you can use...

    Open Source Mac Windows Linux

  • Vanilla JS icon

    Vanilla JS

    Vanilla JS is a fast, lightweight, cross-platform framework for building incredible, powerful JavaScript applications.

    Open Source Mac Windows Linux

  • 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...

    Open Source Self-Hosted JavaScript

  • total.js icon


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

    Open Source Mac Windows Linux Web / Cloud

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  • Pedestal icon


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

    Open Source Mac Linux

  • Chaplin icon


    Chaplin is an architecture for JavaScript applications using the Backbone.js library. Chaplin addresses Backbone’s limitations by...

    Open Source Mac Windows Linux

  • Twisted icon


    Twisted is an event-driven network programming framework written in Python and licensed under the MIT License. Twisted projects...

    Open Source Mac Windows Linux

  • Ractive.js icon


    Ractive.js is different. It solves some of the biggest headaches in web development – data binding, efficient DOM updates, event...

    Open Source Mac Windows Linux

  • Enyo icon


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

    Open Source Mac Windows Linux Android iPhone iPad

  • hapi icon


    A rich framework for building web applications and services. hapi is a simple to use configuration-centric framework with built-in...

    Open Source Mac Windows Linux

  • Mojo.JS icon


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

    Open Source Mac Windows Linux Web / Cloud

  • Gem.js icon


    Gem.js gives you a way to create modular, composable web components and modular, composable styles in pure-javascript. It also...

    Open Source Mac Windows Linux Web / Cloud

  • flatiron icon


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

    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...

    Open Source Mac Windows Linux

  • MontageJS icon


    MontageJS is a modern, full stack HTML5 framework designed to create single-page applications—fast! MontageJS uses time-tested design...

    Open Source Mac Windows Linux

  • intercooler.js icon


    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...

    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...

    Open Source Windows Linux

  • AmplifyJS icon


    AmplifyJS is a set of components designed to solve common web application problems with a simplistic API. Amplify's goal is to...

    Open Source Mac Windows Linux

  • Flight icon


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

    Open Source Mac Windows Linux

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