Parse, validate, manipulate, and display dates in javascript.

A swipeable cards interface. The swipe-left/swipe-right for yes/no input. As seen in apps like Jelly and Tinder, and many others.

Everything you need to add a medium.com style commenting system to your site's frontend.

There is a huge plethora of js charting libraries out there. I had used flot.js for Engadget's price graph, but it took some hackery to get it to work the way we wanted it to. This is a fairly newer one, that focuses on 6 of the most common charts and simplicity of use. There isn't currently any tooltips, but there is a pull request which does have them (and other features). There hadn't been much development on the repo for a while but the creator tweeted a WIP of responsive graphs with tooltips.

A simple, light, flexible, and good-looking share button

Great intro to why you shouldn't nest functions in javascript and how to use js object's prototype.

JavaScript is over fifteen years old; nevertheless, the language is still misunderstood by what is perhaps the majority of developers and designers using the language. One of the most powerful, yet misunderstood, aspects of JavaScript are functions. While terribly vital to JavaScript, their misuse can introduce inefficiency and hinder an application's performance.

EpicEditor is an embeddable JavaScript Markdown editor with split fullscreen editing, live previewing, automatic draft saving, offline support, and more. For developers, it offers a robust API, can be easily themed, and allows you to swap out the bundled Markdown parser with anything you throw at it.

Was on the hunt for a image slider carousel for a website over the weekend and had a hard time finding one I liked, which is surprising because all it's gotta do is rotate images with a fade effect and before and after buttons. I was impressed with the size of this one and how many stars it had on Github.

Canvas Query is a wrapper library for HTML5 Canvas element which allows it to be used with jQuery-like syntax. Also it adds a lot of common use image manipulation methods mainly convenient for gamedevelopers.

"Notificon is a javascript class for providing client-side favicon notifications. Instead of requiring a number of favicons be created and served up to the client, you can specify a label and a favicon (default being the current favicon) and it will generate a favicon notification."