A collective list of free APIs

JavaScript API for Chrome and Firefox

The best React-based framework with performance, scalability and security built in.

Call all Node.js modules directly from DOM/WebWorker and enable a new way of writing applications with all Web technologies.

AI-Powered Photos App for the Decentralized Web 🌈💎✨

High performance Node.js image processing, the fastest module to resize JPEG, PNG, WebP, AVIF and TIFF images. Uses the libvips library.

A completely customizable framework for building rich text editors. (Currently in beta.)

The fast, flexible, and elegant library for parsing and manipulating HTML and XML.

REST API for any Postgres database

JavaScript image gallery for mobile and desktop, modular, framework independent

Streisand sets up a new server running your choice of WireGuard, OpenConnect, OpenSSH, OpenVPN, Shadowsocks, sslh, Stunnel, or a Tor bridge. It also generates custom instructions for all of these s…

👌 Drag and drop so simple it hurts

Markdown parser, done right. 100% CommonMark support, extensions, syntax plugins & high speed

Fast math typesetting for the web.

Font files available from Google Fonts, and a public issue tracker for all things Google Fonts

Emoji for everyone. https://twemoji.twitter.com/

A very compact representation of a placeholder for an image.

⏱ A library for working with dates and times in JS

WebRTC Web demos and samples

Content aware image cropping

Create badass, fluid and smooth transitions between your website’s pages

WebRTC, WebRTC and WebRTC. Everything here is all about WebRTC!!

The package of IBM’s typeface, IBM Plex.

general natural language facilities for node

thumbor is an open-source photo thumbnail service by globo.com

Audio waveform player

A bit like Solr, but much smaller and not as bright

Micro check library

No longer maintained, superseded by JS Cookie:

The ProseMirror WYSIWYM editor