Cram
Simple AMD and CommonJS module bundler.
Mobx
Simple, scalable state management.
Hydra.js
Create a scalable, maintainable and module oriented system using Hydra.js
Theory
Abstraction layer for cross platform JavaScript.
Lazyload
Tiny, dependency-free async JavaScript and CSS loader.
Tangle
a JavaScript library for reactive documents
Platform.js
A platform detection library that works on nearly all JavaScript platforms.
jTypes
jTypes is the most comprehensive and robust JavaScript library for overcoming differential inheritance with prototype-based objects. Its lightweight yet powerful design provides web programmers on any platform or browser the ability to emulate classical inheritance where objects are defined by classes.
Functional Js
A functional js library that facilitates currying and point-free / tacit programming
Robotjs
Node.js Desktop Automation.
Boiler
Boiler is a utility library that makes every day tasks in JavaScript easier by providing over 115 methods that work on arrays, collections, functions, numbers, objects, and strings.
JSON Editor Online
A web-based tool to view, edit and format JSON
Jsface
Small, fast, elegant, powerful, and cross platform JavaScript OOP library. Support main(), singleton, super call, private, mixins, plugins, AOP and more.
Stimulus
A modest JavaScript framework for the HTML you already have
Gijgo
Gijgo - Free Javascript Controls
Maria
The MVC framework for JavaScript applications. The real MVC. The Smalltalk MVC. The Gang of Four MVC.