Zepto
Zepto.js is a minimalist JavaScript library for modern browsers, with a jQuery-compatible API
Pdfmake
Client/server side PDF printing in pure JavaScript
Bootstrap Daterangepicker
Date range picker component for Bootstrap
Paper.js
The Swiss Army Knife of Vector Graphics Scripting – Scriptographer ported to JavaScript and the browser, using HTML5 Canvas. Created by @juerglehni & @jonathanpuckey
Sinon.js
Test spies, stubs and mocks for JavaScript.
Konva
Konva.js is an HTML5 Canvas JavaScript framework that extends the 2d context by enabling canvas interactivity for desktop and mobile applications.
Fuse
Lightweight fuzzy-search, in JavaScript
Marko
Marko template engine
Adonis Framework
NodeJs Web Application Framework. Makes it easy for you to write webapps with less code :smiley:
Pace
Automatically add a progress bar to your site. #hubspot-open-source
Jasmine
DOM-less simple JavaScript testing framework
Apify Js
Apify SDK — The scalable web crawling and scraping library for JavaScript. Enables development of data extraction and web automation jobs (not only) with headless Chrome and Puppeteer.
Protractor
E2E test framework for Angular apps
JSHint
JSHint is a community-driven tool to detect errors in JavaScript code and enforce your team's coding conventions.
Node Browserify
browser-side require() the node.js way
Dom Purify
DOMPurify - a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMPurify works with a secure default, but offers a lot of configurability and hooks. Demo:
Grunt
Grunt: The JavaScript Task Runner