Papa Parse
Fast and powerful CSV (delimited text) parser that gracefully handles large files and malformed input
Money.js
money.js is a tiny (1kb) javascript currency conversion library, for web & nodeJS
Chart.js
Simple HTML5 Charts using the <canvas> tag
Forerunner Db
A JavaScript database with mongo-like query language, data-binding support, runs in the browser as a client-side DB or on the server via Node.js!
Vague Time
A tiny JavaScript library that formats precise time differences as a vague/fuzzy time, e.g. '3 months ago', 'just now' or 'in 2 hours'.
Morris.js
Pretty time-series line graphs
Z.js
turns content (in)visible
Plottable
A library of modular chart components, built on D3
Heatmap.js
JavaScript Library for HTML5 canvas based heatmaps
Brain
[UNMAINTAINED] Neural networks in JavaScript
Horizon React
Simplifying the connection between Horizon and React by using higher order components.
Chartkick
Create beautiful Javascript charts with one line of Ruby
Fortune
A library for managing structured data in Node.js and web browsers.
Table to Json
Serializes HTML tables into JSON objects.
Springy
A force directed graph layout algorithm in JavaScript
Backgrid
Finally, an easily stylable semantic HTML data grid widget with a Javascript API that doesn't suck.
Ydn Db
Javascript database module for Indexeddb, Web SQL and localStorage storage mechanisms supporting version migration, advanced query, SQL and transaction.