Siema
Siema - Lightweight and simple carousel in pure JavaScript
Csso
CSS-optimizer
Shader School
A workshopper for GLSL shaders and graphics programming
Lazy.js
Like underscore.js, but lazier
Midi.js
Making life easy to create a MIDI-app on the web. Includes a library to program synesthesia into your app for memory recognition or for creating trippy effects. Convert soundfonts for Guitar, Bass, Drums, ect. into code that can be read by the browser. Supports multiple simultaneous instruments and perfect timing.
Cylon
JavaScript framework for robotics, drones, and the Internet of Things (IoT)
Twgl.js
A Tiny WebGL helper Library
jQuery Timepicker
Adds a timepicker to jQueryUI Datepicker
Jcrop
Jcrop (official) - Image Cropping Plugin for jQuery
Oc Lazy Load
Load modules on demand (lazy load) in AngularJS
jQuery QR Code
qrcode generation standalone (doesn't depend on external services)
Bespoke.js
DIY Presentation Micro-Framework
Ion.range Slider
jQuery only range slider
Tinycon
A small library for manipulating the favicon, in particular adding alert bubbles and changing images.
Deck.js
Modern HTML Presentations
Assemble
Static site generator for Node.js, Grunt.js, and Yeoman (and soon, Gulp), using the Handlebars template engine. Used by Zurb Foundation, Zurb Ink, H5BP/Effeckt, Less.js / lesscss.org, Topcoat, Web Experience Toolkit, and hundreds of other projects to build sites, themes, components, documentation, blogs and gh-pages. Pull requests welcome, stars appreciated!
Sugar
A Javascript library for working with native objects.