Plyr.js: HTML video player
Plyr.js is an HTML5 video player library with out the box support for YouTube and Vimeo media.
BWIP.js: Barcode generator
C3.js: Responsive charts
C3.js is an animatable responsive data chart library built on D3.js.
Chart.js: Responsive charts
Chart.js is an animatable responsive chart library that utilizes and renders HTML5 Canvas.
Chartist.js: Responsive charts
Chartist.js is an animatable responsive chart library that utilizes and renders SVG's.
Classie.js: Class helper
Classie.js allows you to easily add, remove and check for CSS classes.
Cleave.js: Format Input text
Cleave.js formats form inputs on the fly and really shines when it comes to credit card, phone number and date fields.
Clusterize.js: Optimize large data sets
Clusterize.js is library that efficiently optimizes your data when dealing with large lists of data in the DOM.
ContentTools.js: WYSIWYG text editor
ContentTools.js is a customizable content editor with support to modify content blocks throughout your web page.
Custombox.js: Modal windows
Custombox.js is a modal window library bundled with neat CSS transitions.
DateFns.js: Date functions
DateFns.js is a date utility library with support for functions such as isPast, distanceInWordsToNow and differenceInDays.
DialogModal.js: Modal windows
DialogModal.js is a simple accessibility focused modal window library from the team at Frend.
Dragula.js: Drag and drop library
Dragula.js is a nifty little drag & drop library useful for re-ordering lists vertically and horizontally.
Drift.js: Zoom on hover
Drift.js adds customizable zoom on hover functionality to your images.
Dropzone.js: Drag & drop uploads
Dropzone.js is a drag and drop style frontend file uploader with upload progress and file previews.
Dynamics.js: Animation library
Dynamics.js is an animation library packaged with default easings such as spring, bounce and gravity.
Elevator.js: Scroll top library
Elevator.js is a satisfying scroll top library that gracefully plays elevator music as it returns you to the top of the page.
Embed.js: Embed media from text string
Embed.js converts standard text strings into embedded media on the fly. Embed.js supports Emojis, SoundCloud, Spotify, Twitter, Github, Markdown and more.
EQCSS.js: Element queries
EQCSS.js is CSS @media queries on steroids. EQCSS.js vastly improves your control over CSS with @element queries.
Fabric.js: HTML canvas library
Fabric.js allows you to manipulate canvas elements via drag & drop, free drawing, touch events and more.
Feature.js: Browser feature detection
Feature.js is a browser feature detection library that makes it easier to progressively enhance your web app.
Flatpickr.js: Date picker
Flatpickr.js is a lightweight date and time picker.
Grafi.js: Image processing
Grafi.js is an image processing library with support for invert, contrast, posterize and blur adjustments.
GreenSock.js: Animation library
GreenSock.js (also GSAP, TweenMax) is an animation library built to animate anything in any browser.