Jsface
Small, fast, elegant, powerful, and cross platform JavaScript OOP library. Support main(), singleton, super call, private, mixins, plugins, AOP and more.
Contra
Asynchronous flow control with a functional taste to it
Vue Moment
Handy Moment.js filters for your Vue.js project.
Meld
AOP for JS with before, around, on, afterReturning, afterThrowing, after advice, and pointcuts
Jquery Timeago
Timeago is a jQuery plugin that makes it easy to support automatically updating fuzzy timestamps (e.g. "4 minutes ago").
Tweet
put twitter on your website with tweet, an unobtrusive javascript plugin for jquery
Radio
Dependency-free Chainable Publish/Subscribe Library for Javascript
Bottlejs
A powerful, extensible dependency injection micro container for JavaScript applications
Refluxjs
A simple library for uni-directional dataflow application architecture inspired by ReactJS Flux
Libretaxi
LibreTaxi, free and open source Uber/Lyft alternative to connect passengers and drivers.
Is.js
Micro check library
Bacon.js
FRP (functional reactive programming) library for Javascript
Routie
a tiny javascript hash router
Backbone.stickit
Backbone data binding, model binding plugin. The real logic-less templates.
Jquerypp
jQuery's missing utils and special events
Node Browserify
browser-side require() the node.js way
Loglevel
Minimal lightweight logging for JavaScript, adding reliable log level methods to wrap any available console.log methods