LABjs
Loading And Blocking JavaScript: On-demand parallel loader for JavaScript with execution order dependencies
Tungstenjs
Tungsten.js is a modular framework for creating web UIs with high-performance rendering on both server and client.
Stapes
a (really) tiny Javascript MVC microframework
Platform.js
A platform detection library that works on nearly all JavaScript platforms.
Knockout Projections
Knockout.js observable arrays get smarter
Ect
Fastest JavaScript template engine with embedded CoffeeScript syntax
Curl
A small, fast module and resource loader with dependency management. (AMD, CommonJS Modules/1.1, CSS, HTML, etc.)
Cerebral
A state controller with its own debugger
Backbone.stickit
Backbone data binding, model binding plugin. The real logic-less templates.
Pegasus
Load data while still loading other scripts and display data faster in jQuery, Backbone, Angular, ... apps
Mobx
Simple, scalable state management.
Koa
Expressive middleware for node.js using ES2017 async functions
Robotjs
Node.js Desktop Automation.
Egjs
Set of UI interactions, effects and utilities components library using jQuery.
Do T
The fastest + concise javascript template engine for nodejs and browsers. Partials, custom delimiters and more.
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.
Pilot
Pilot — multifunction JavaScript router.