Reasondb
A 100% JavaScript object database: SQL like syntax, full-text search, auto object sync, swapable persistence engines, asynchronous cursors, streaming analytics, 18 built-in plus in-line fat arrow predicates, predicate extensibility, indexed computed values, joins, nested matching, statistical sampling and more.
Out Front Js
Console for mobile browsers and webviews.
Aja.js
Ajax without XML : Asynchronous JavaScript and JavaScript/JSON(P)
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!
Jszip
Create, read and edit .zip files with Javascript
Sheetrock
Quickly connect to, query, and lazy-load data from Google Spreadsheets.
Smoothie
Smoothie Charts: smooooooth JavaScript charts for realtime streaming data
Dc.js
Multi-Dimensional charting built to work natively with crossfilter rendered with d3.js
Datamaps
Maps for interactive data visualizations in Javascript
Countable
Countable is a JavaScript function to add live paragraph-, word- and character-counting to an HTML element.
Lowdb
An extendable JSON database for Node and the browser powered by lodash
C3
A D3-based reusable chart library
Tiny Slider
Vanilla javascript slider for all purposes.
Tabletop
Tabletop.js gives spreadsheets legs
Convnetjs
Deep Learning in Javascript. Train Convolutional Neural Networks (or ordinary ones) in your browser.
jQuery File Upload
File Upload widget with multiple file selection, drag&drop support, progress bars and preview images for jQuery. Supports cross-domain, chunked and resumable file uploads and client-side image resizing. Works with any server-side platform (PHP, Python, Ruby on Rails, Java, Node.js, Go etc.) that supports standard HTML form file uploads.
Local Forage
Offline storage, improved. Wraps IndexedDB, WebSQL, or localStorage using a simple but powerful API.