RequireJS
A file and module loader for JavaScript
Tungstenjs
Tungsten.js is a modular framework for creating web UIs with high-performance rendering on both server and client.
Pegasus
Load data while still loading other scripts and display data faster in jQuery, Backbone, Angular, ... apps
Conditioner
Frizz Free, Environment-aware, JavaScript Modules
Optics
Profunctor implementation of Lenses, Prisms, Traversals, Isos, etc.
Pilot
Pilot — multifunction JavaScript router.
Lovli.js
A boilerplate for developing react+redux applications with rethinkdb/horizon as realtime database and express for the server.
Use.js
An AMD/RequireJS plugin for consuming incompatible JavaScript files.
PreloadJS
PreloadJS makes preloading assets & getting aggregate progress events easier in JavaScript. It uses XHR2 when available, and falls back to tag-based loading when not.
Knockout
Knockout makes it easier to create rich, responsive UIs with JavaScript
Twitterlib
Twitter JavaScript API library
Straw
Realtime processing framework for Node.js
Jade
Jade - robust, elegant, feature rich template engine for nodejs
Connective
agent-based reactive programming library for typescript
Dozerjs
Foundational Framework for NodeJS Web Services
Oc Lazy Load
Load modules on demand (lazy load) in AngularJS