Free Software for Node.js
Express.js
Express.js is a free and open-source web application framework for Node.js, released as free and open-source software under the MIT License. Express is designed for building fast web applications and APIs. In the Node.js community the Express framework is seen as the defacto standard when it comes to building such applications. The philosophy of the framework is to provide a small and robust toolset for building HTTP servers with JavaScript and Node.js. Express does not force you to use any specific database, ORM or templating language, as it leaves that up to you as a developer, to maximize freedom and choice. Express.js is used by companies and hobby developers alike to build single page JavaScript applications, websites, hybrids and public HTTP APIs.
Reaction Commerce
Reaction Commerce is an open-source, headless, API-first, and modular commerce stack made for ambitious brands and retailers. Reaction’s service-based architecture is built to deliver flexibility and freedom at scale.
Nuxt.js
Nuxt.js is an intuetive Vue framework that supports generating a static website based on your Vue application. It provides the best of both worlds, as you don't need a server, yet can reap the SEO benefits. Nuxt achives this by pre-rendering all pages and include the necessary HTML. And when you are ready to deploy, Nuxt.js got you covered with simple integrations to serverless and third-party providers such as Netlify, Vercel and GitHub pages.
JungleJS
JungleJS is a free and open-source static site framework for Svelte. JungleJS generates completely static code that doesn't have to be hydrated into a single page application, or SPA.
React
React is a free an open-source Javascript framework for frontend development. With React you can build powerful, component-based application that supports compilation of JSX, ES6 and auto-prefixed CSS files. The popular framework is developed by Facebook and used by countless of applications across the web and mobile devices to build structured user interfaces or UI components.
Saleor
A free and open-source headless, GraphQL-first e-commerce platform delivering ultra-fast, dynamic and personalized shopping experiences. Saleor is built with Django and React and empowers mid-size and enterprise retailers and brands looking for the most flexible e-commerce to innovate rapidly with no constraints. Saleor is free forever, and provides enterprise support at a monthly cost.
Total.js
Total.js is a free and open-source framework for Node.js platform written in pure JavaScript. The framework share many similarities with other giants like PHP's Laravel, Python's Django and ASP.NET MVC. Developers use Total.js to build modern web, desktop and IoT applications.
Koa
Koa is a free and open-source, expressive HTTP middleware framework for Node.js. Koa provides a great developer experience that makes writing web applications and APIs more enjoyable. Koa's middleware stack flows in a stack-like manner, allowing you to perform actions downstream then filter and manipulate the response upstream. Only methods that are common to nearly all HTTP servers are integrated directly into Koa's small codebase. This includes things like content negotiation, normalization of node inconsistencies, redirection, and a few others.
KeystoneJS
KeystoneJS is an open source JavaScript & Node.js framework that make build database-driven websites and web applications. Under the hood, KeystoneJS uses the express.js web server framework, and a MongoDB database via the mongoose object modelling framework.
Electron
Electron is a framework that lets you build cross-platform desktop apps with JavaScript, HTML, and CSS. It takes care of the hard parts of building native software, so that you can focus on the core purpose of your application.