<canvas> and SVG. You can design and render simple 3D models on the Web. Zdog is a pseudo-3D engine. Its geometries exist in 3D space, but are rendered as flat shapes.
Pell is the simplest and smallest WYSIWYG text editor for web, with no dependencies.
You can use Workbox to simplify your development by making it easy to take advantage of powerful service worker features, eliminate boilerplate code, and automate service worker generation.
pull-to-reload is a pull to refresh implementation for the web. Designed to work with both mobile and desktop devices. Fits nicely with web-apps or single-page applications (SPA)
AlloyFinger is a super tiny size multi-touch gestures library for the web.
Popper.js is a library used to create poppers in web applications. Common examples of poppers are tooltips and popovers.
mo.js is a powerful motion graphics library for the web.
howler.js is an audio library for the modern web. It defaults to Web Audio API and falls back to HTML5 Audio.
Two.js is a two-dimensional drawing api geared towards modern web browsers. It is renderer agnostic enabling the same api to draw in multiple contexts:
JuliusJS is a speech recognition library for the web.It actively listens to the user to transcribe what they are saying through a callback.