Opa is described as 'Open source, simple and unified platform for writing web applications. All aspects are directly written in Opa: Frontend code, backend code, database queries and configuration. And everything is strongly statically typed' and is a Web Framework in the development category. There are more than 25 alternatives to Opa for a variety of platforms, including Linux, Mac, Windows, Self-Hosted and Web-based apps. The best Opa alternative is Angular, which is both free and Open Source. Other great apps like Opa are Meteor, Express, KnockoutJS and FeathersJS.
Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages.
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 their lifetime inside the modern distributed...
Express is a minimal yet robust Node.js web application framework, providing extensive HTTP utilities and middleware for rapid API creation. Its thin and adaptable architecture ensures simplicity while retaining Node.js core features, making it ideal for scalable apps.
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.
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.
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.
An efficient server implies a lower cost of the infrastructure, a better responsiveness under load and happy users. How can you efficiently handle the resources of your server, knowing that you are serving the highest number of requests possible, without sacrificing security...
A non-opinionated, totally customizable JavaScript framework designed for writing programs that scale across any platform.
MVC framework making it easy to write realtime, collaborative applications that run in both Node.js and browsers.
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 manipulate the response upstream.
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