Detect timezone using javascript

Link here.

Tips on designing a credit card payment form

Link here.

Clean up messy html/css/js code

Link here.

Customise bootstrap theme

Link here.

Expanding the overlay div beautifully

Link here.

Remote preview

Get a remote preview of your mobile site on different sized devices here.

Polyfills for incapable browsers ( Webshims Lib )

Best thing about this plugin is that it only downloads the features that are not supported by a browser. That means, the more features supported by a browser, more lightweight the plugin gets.
Link here

Learn sprites use quickly with a cool demo!

Link here.

A super cool way to critique the webpage design by zurb!

Link here.

Awesome static file server for Nodejs

Lactate serves as a static file server for nodejs and is currently faster and better than all others out there.
Link here.

Searching for online android emlators ?

Link here.
If you're working on your android app and you don't have all the devices to test it on, here is an answer.
You can run your app on online emulator provided for almost all sizes and resolutions of android devices on this online service.
No hassle to download/install any SDKs or other emulator setups.
It's in beta still and is absolutely free. 

Tutorial on knockoutjs

Link here.

A javascript validator for nodejs

Link here.

A list of jquery chat plugins

Link here.