algebra.js
Build, display, and solve algebraic equations in JavaScript.
http://algebra.js.org
solve and display equations like Mathematica
howler.js
howler.js makes working with audio in JavaScript easy and reliable across all platforms.
https://howlerjs.com/
rate up or splite multi audio tracks like a DJ
Lorem Ipsum
Lorem Ipsum is simply dummy text of the printing and typesetting industry.
http://www.lipsum.com/
generate random Latin articles without repeating or embarrassment
for node.js: https://github.com/traviskaufman/node-lipsum
Freewall
Freewall is a cross-browser and responsive jQuery plugin to help you create many types of grid layouts
http://vnjs.net/www/project/freewall/
just like winPhone
ZooMove | jQuery Zoom Image
http://emersonthompson.com.br/zoomove/
https://github.com/thompsonemerson/zoomove
It's a plugin developed with jQuery, that allows to dynamically zoom images with mouse-over, and view details with mouse move.
jQuery Rippleria
https://github.com/nsept/rippleria
A lightweight yet customizable jQuery plugin for implementing Material Design inspired ripple click / tap effects.
clicking in a material design way
Turntable.js 2.0
Responsive JQuery Slider
"a flipbook made with Javascript"
https://polarnotion.github.io/turntable/
Vide.js
Easy as hell jQuery plugin for video backgrounds.
http://vodkabears.github.io/vide/
cool video background
Trianglify
Algorithmically generated triangle art
http://qrohlf.com/trianglify/
gorgeous low poly background
Tooltipster
https://iamceege.github.io/tooltipster/
A flexible and extensible jQuery plugin for modern tool tips.
Timedropper
http://felicegattuso.com/projects/timedropper/
a jQuery time plugin
such an eye candy
