Free Software for Node.js
Vapid
Vapid is a free and open-source CMS that takes the best of static site builders and introduces the ability to have a dashboard with almost no extra effort. As static site builders like Jekyll and Middleman offer a modern development environment but are for the most part difficult to share with folks who would like a dashboard to edit content. Vapid is designed to be an intentionally simple content management system built on the idea that you can create a custom dashboard without ever leaving the HTML.
WatermelonDB
WatermelonDB is a free and open-source database optimized for building complex applications in React and React Native. The goal of WatermelonDB is to provide real-world performance for apps that can scale from hundreds to tens of thousands of records and while remaining performant. Loading a full database into JavaScript can be expensive, WatermelonDB fixes this by being lazy as a default, and only loads data upon request.
SurrealDB
SurrealDB is an innovative cloud database, suitable for serverless applications, JAMstack applications, single-page applications, and traditional applications.It reduces the development time of modern applications by simplifying your database and API stack, removing the need for most server-side components. Allowing you to build secure, performant apps quicker and cheaper. For a hassle-free setup, get started with SurrealDB Cloud in one-click.
TaffyDB
TaffyDB is a free and open source, Pure-JavaScript database abstraction that stores data in JSON format. TaffyDB provides INSERT, DELETE, GET (SELECT) and JOIN methods to execure the data similar to that of traditional relational SQL databases. TaffyDB allows you to quickly setup an in-memory database that can be used in the same fashion as an SQLite database would, without configuration and a database server running.
VuePress
VuePress is a free and open-source Vue-powered Static Site Generator or SSG for short. VuePress utilize the power and simplicity of Markdown files to generate content. Which allow the creator to focus on their writing, instead of formatting HTML. With VuePress, developers can harnes the power of Vue components in a simplified build step using Vue + webpack.
Egg.js
Egg.js is a free and open-source JavaScript and Node.js framework for building better enterprise applications.
pump.io
Pump.io is a general-purpose activity streams engine that can be used as a federated social networking protocol. With Pump.io almost anything can be represented with activity streams including short or long text, bookmarks, images, video, audio, events, geo checkins. You can follow friends, create lists of people, and much more.
PostCSS
PostCSS is a software development tool that uses JavaScript-based plugins to automate routine CSS operations. The free and open-source library was designed and written by Andrey Sitnik and the community. PostCSS is used in a multitude of web-based application across the web where it helps developer to optimize CSS and bring a better experience to end-users.
Phaser
Phaser is a fast, free, and fun open source HTML5 game development framework. It uses a custom build of Pixi.js for WebGL and Canvas rendering, and supports desktop and mobile web browsers. Games developed with Phaser can be compiled to iOS, Android and native desktop apps via third party tools. With Phaser you can developed games written in JavaScript or TypeScript.