Completely Customise your select box

Link here.

Css3 box-shadow explained in quite simple straight forward way.

Link here.

A javascript library for multi-touch gestures

Link here.

Want to track user's head/face movements from the browser through their camera?

Link here.

Make your website talk globally to the user

Globalize the content of the website according to from where a user is coming from.
Simple example, someone from india would want to see the date on the site as dd/mm/yyyy
and someone from the USA would want to see the date mm/dd/yyyy.
Link here.

Knowing flexbox

Link here.

Plugin to skew elements' shapes

Link here.

Jquery plugin to do things on scroll event

Link here.

Easy cross platform scrolling effects for touch devices

Link here for a slide presentation.
Superscrollorama provides super animations when we scroll.
Stellar.js provides cool parallax effects while scrolling.
iScroll and Zyanga scroller simply makes scrolling smooth on all touch devices.

Ways to customise html5 form validation options

Link here.

Nice :nth element tester by Chris Coyier

A nice interface to check out which nth element will be affected when we apply the :nth pseudo selector on it.

Link here.

Quick tips on making resposive menus

Link here.

Bored of twitter bootstrap and/or want metro style buttons and icons?

Link here.

A jquery plugin to call css files according to the window screen

Link here.

Customising form with cool elements and themes

Link here