Mailcheck
Email domain spelling suggester
Clmtrackr
Javascript library for precise tracking of facial features via Constrained Local Models
Stats.js
JavaScript Performance Monitor
Dicebear
DiceBear is an avatar library for designers and developers.
Vex
A modern dialog library which is highly configurable and easy to style. #hubspot-open-source
LZ String
LZ-based compression algorithm for JavaScript
Hello.js
A Javascript RESTFUL API library for connecting with OAuth2 services, such as Google+ API, Facebook Graph and Windows Live Connect
G2 Plot
:dango: An interactive and responsive charting library
Framer
Modern Prototyping Tool
Kendo Ui Core
Kendo UI Core
Loki JS
javascript embedded / in-memory database
Lightgallery.js
Full featured javascript lightbox gallery. No dependencies.
Metrics Graphics
A library optimized for concise, principled data graphics and layouts.
Remarkable
Markdown parser, done right. Commonmark support, extensions, syntax plugins, high speed - all in one.
Jquery Transit
Super-smooth CSS3 transformations and transitions for jQuery
Jquery Timeago
Timeago is a jQuery plugin that makes it easy to support automatically updating fuzzy timestamps (e.g. "4 minutes ago").
Stream Saver.js
StreamSaver writes stream to the filesystem directly asynchronous