Backbone.stickit
Backbone data binding, model binding plugin. The real logic-less templates.
Overmind
Overmind - Frictionless state management
JsRender
A light-weight but powerful templating engine, highly extensible, without DOM or jQuery dependency.
Machina.js
js ex machina - finite state machines in JavaScript
Sift.js
filter arrays using mongodb queries
Nanobar
Very lightweight progress bars. No jQuery
Montage
Core framework: Montage simplifies the development of rich HTML5 applications by providing modular components, real-time two-way data binding, CommonJS dependency management, and many more conveniences. Join us on irc.freenode.net#montage or https://groups.google.com/d/forum/montagejs
Almond
A minimal AMD API implementation for use after optimized builds
Curl
A small, fast module and resource loader with dependency management. (AMD, CommonJS Modules/1.1, CSS, HTML, etc.)
Blazy
bLazy is a lightweight lazy loading and multi-serving image script. It's written in JavaScript why it doesn't have any dependencies for 3rd party libraries like jQuery. bLazy is working in all modern browser including IE7+.
Simplecart
A simple javascript shopping cart that easily integrates with your current website.
Backbone Layout Manager
A layout and template manager for Backbone.js applications.
Across Tabs
Easy communication between cross-origin browser tabs
React Templates
Light weight templates for react
Humane.js
A simple, modern, browser notification system
Webshim
Webshims Lib is a modular capability-based polyfill-loading library
Impress
Impressive totalitarian style Multipurpose Application Server for node.js. All decisions are made. Solutions are scaled. Tools are provided and optimized for high load. Ready for applied development and production.