Is.js
Micro check library
Tiny Slider
Vanilla javascript slider for all purposes.
Barba.js
Create badass, fluid and smooth transition between your website's pages.
Litegraph.js
A graph node engine and editor written in Javascript similar to PD or UDK Blueprints, comes with its own editor in HTML5 Canvas2D. The engine can run client side or server side using Node. It allows to export graphs as JSONs to be included in applications independently.
Gl Matrix
Javascript Matrix and Vector library for High Performance WebGL apps
Bookshelf
A simple Node.js ORM for PostgreSQL, MySQL and SQLite3 built on top of Knex.js
HTML5shiv
This script is the defacto way to enable use of HTML5 sectioning elements in legacy Internet Explorer.
React Leaflet
⚛️ React components for 🍃 Leaflet maps
Webfontloader
WebFont Loader gives you added control when using linked fonts via @font-face.
Bignumber.js
A JavaScript library for arbitrary-precision decimal and non-decimal arithmetic
Tether
A positioning engine to make overlays, tooltips and dropdowns better #hubspot-open-source
Lozad.js
🔥 Highly performant, light ~0.9kb and configurable lazy loader in pure JS with no dependencies for responsive images, iframes and more
Parallax
Parallax Engine that reacts to the orientation of a smart device
Offline
Automatically display online/offline indication to your users. #hubspot-open-source
Angular Strap
AngularJS 1.2+ native directives for Bootstrap 3.
Rete
JavaScript framework for visual programming and creating node editor
Chance
Chance - Random generator helper for JavaScript