jQuery Validation Plugin
Fast, easy and reliable testing for anything that runs in a browser.
Medium.com WYSIWYG editor clone.
A lightweight and modular front-end framework for developing fast and powerful web interfaces.
The official jQuery user interface library.
E2E test framework for Angular apps
Ajax with less suck - (and node.js HTTP client to match)
A package manager for the web, created at Twitter
Offline storage, improved. Wraps IndexedDB, WebSQL, or localStorage using a simple but powerful API.
The de-facto solution to flexible routing with nested views
browser-side require() the node.js way
Super simple WYSIWYG editor