Canjs
Can do JS, better, faster, easier.
Thinkjs
Use full ES2015+ features to develop Node.js applications, Support TypeScript.
Hinclude
declarative client-side inclusion for the Web
Eve.js
A <3kb JavaScript file providing three simple methods to organize code into CSS namespaces which magically restrict code to the current context, allowing for dramatic reductions to code size and development time.
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+.
Sentry
Sentry is a realtime error logging and aggregation platform
Functional Js
A functional js library that facilitates currying and point-free / tacit programming
Backbone Marionette
Make your Backbone.js apps dance with a composite application architecture!
Angular Meteor
Combining the simplicity and power of AngularJS and Meteor
Hermes.js
Message and Error logger implementation
Tungstenjs
Tungsten.js is a modular framework for creating web UIs with high-performance rendering on both server and client.
Robotjs
Node.js Desktop Automation.
Paperclip.js
reactive DOM template engine built for speed, and extensibility
Then.js
The fastest, smallest, fully compatible, full-featured asynchronous module!
Prime
an OOP javascript library for node.js and the browsers
Invisible
Invisible.js: Reusable models for the client and the server