JavaScript Libraries and Tools Page 15 of 19

Pretext is a tiny (15KB gzipped) zero-dependency TypeScript library that handles text layout, measurement, and rendering entirely outside the DOM. Created by Cheng Lou (React core team, Reason, Midjourney), it delivers up to 500x faster performance than traditional DOM...

EstyJS is an emulator for the Atari ST, written in 100% pure JavaScript, originally developed by Darren Coles. Since 2024 and the release of EstyJS 2.0, the project is maintained by Kai Eckert. The source code is available on GitHub.

World's Fastest Rendering Data Visualization Controls for Building Stunning Apps.

Open-source CLI that measures brand visibility across ChatGPT, Claude, Gemini and Perplexity, then exports a 30-day AEO action plan.

Some weird but useful JavaScript text animations.

Realize new solutions through the transparence of JSON documents-chains, cryptography, and peer-to-peer networks.

A lightweight inline rich text editor designed for applications where users edit content directly on the page.

Visimer brings “what you see is what you get” editability to Mermaid diagrams. Rename labels, change shapes, add new nodes, etc. by live editing the rendered diagram.

It is an application that can read the subtitles files and play them without the video. It could be useful to watch streaming videos which would not have subtitles.

7Calc is an programmer's expression calculator. It is the spiritual successor to the original 'supercalc'. 7Calc is designed as a Windows 7 Desktop Gadget, and is written in Javascript/HTML.

Rstest is a testing framework powered by Rspack. It delivers comprehensive, first-class support for the Rspack ecosystem, enabling seamless integration into existing Rspack-based projects.

Next-gen, Pusher-compatible, open-source WebSockets server. Simple, fast, and resilient.

NextAuth.js is a complete open-source authentication solution for Next.js applications. It is designed from the ground up to support Next.js and Serverless.

faces.js is a JavaScript library that generates and displays cartoon faces, somewhat reminiscent of how the Nintendo Wii generates random Miis. Faces are drawn as scalable vector graphics (SVG). Each face can also be represented by a small JavaScript object, which allows you to...

Micro-dash offers a subset of the functionality found in Lodash, with drastically reduced bundle size.

The MathLive library includes a <math-field> web component that provides an easy-to-use interface for editing math.

Seamless, headless and fully-tested HTML5 canvas library that provides a couple of high level APIs.

JsDiagram is a native JavaScript library which provides developers with a rich choice of graph and flowchart features, numerous automatic graph layout algorithms, import and export options, rich user interaction features and appearance settings.

A production-grade animation library for the web. Free and open source. Create stunning web animations for React, JavaScript and Vue.

Historically, software platform vendors have created lock-ins for customers that building on their stacks. Open source has provided greater freedom and reduced investments for applications projects. The so-called Platform As A Service (PaaS) offerings from the cloud providers...

Ant is a lightweight, high-performance JavaScript runtime built from scratch. It runs real npm packages, starts instantly and ships as a portable 9 MB binary.

GYP is a Meta-Build system: a build system that generates other build systems.

A scalable framework for realtime apps and microservices.

Delete all your Tweets for free.

Toolcraft is an open-source starter kit and UI library for building custom design apps with AI. Use it to create small creative products, internal utilities, interactive experiments, and tools tailored to your workflow.