JSON Editor Online
A web-based tool to view, edit and format JSON
Cytoscape.js
A JavaScript graph library for analysis and visualisation (compatible with CommonJS/Node.js, AMD/Require.js, jQuery 1.4+, Bower, npm, and plain JavaScript)
Papa Parse
Fast and powerful CSV (delimited text) parser that gracefully handles large files and malformed input
Tone.js
A Web Audio framework for making interactive music in the browser.
Sigma
An open-source lightweight JavaScript graph drawing library
Jasmine
DOM-less simple JavaScript testing framework
Lowdb
An extendable JSON database for Node and the browser powered by lodash
Nock
HTTP mocking and expectations library
Dragula
:ok_hand: Drag and drop so simple it hurts
Hover
A collection of CSS3 powered hover effects to be applied to links, buttons, logos, SVG, featured images and so on. Easily apply to your own elements, modify or just use for inspiration. Available in CSS, Sass, and LESS.
Svg.js
A lightweight library for manipulating and animating SVG
Zepto
Zepto.js is a minimalist JavaScript library for modern browsers, with a jQuery-compatible API
Bootstrap Daterangepicker
Date range picker component for Bootstrap
Testcafe
A Node.js tool to automate end-to-end web testing.
Wavesurfer.js
Navigable waveform built on Web Audio and Canvas
Crypto Js
JavaScript library of crypto standards.
Stimulus
A modest JavaScript framework for the HTML you already have