PWChecker is a jQuery password checker plugin that can be integrated seamlessly with any online form (sign up form/ user registration form) to check password strength.

This jQuery password checker script tells users what is a good and strong password and helps them make a their password strong and secure.

Impress.js is a presentation framework based on the power of CSS3 transforms and transitions in modern browsers. It helps you to create visually stunning presentations with CSS3 awesomeness.

Currently impress.js works fine in latest Chrome/Chromium browser, Safari 5.1 and Firefox. As it was not developed with mobile browsers in mind, it currently doesn’t work on any mobile devices, including tablets.

deCSS3 is a bookmarklet for testing your graceful degradation of CSS3 features.

Use this bookmarklet to get a whiff of what your site will look like on older browsers that don’t support CSS3.

deCSS3 saves time and let you see how well your pages are gracefully degrading without having to open up IE6-8.

Stellar.js is a jQuery plugin that adds parallax scrolling effects to any scrolling element. Parallax has never been this easier, add some simple data attributes to your markup, run $.stellar(). That’s all you need to get started.

Mobile Safari halts code execution during scroll so you can’t use normal scroll events to animate. By using an iOS scrolling library (Scrollability) it bypasses this limitation.

PxLoader is a Javascript library that helps you download images, sound files or anything else you need before you take a specific action on your site (like showing a user interface or starting a game). You can use it to create a preloader for HTML5 games and websites.

It let’s you monitor download status by providing progress and completed events and it lets you prioritize the order in which items are downloaded. You can even tag groups of files and then prioritize downloads or register for events by tag.

Fbootstrapp is a toolkit designed to kick-start development of Facebook iframe apps.

It is based on Twitter’s excellent Bootstrap. Just as that, it includes base CSS styles for typography, forms, buttons, tables, grids, navigation, alerts, and more.

You can use Fbootstrapp in one of two ways: just drop the compiled CSS into any new project and start cranking, or run LESS on your site and compile on the fly like a boss.

Revolver.js is a new content slider that has no assumptions about your markup. Think of Revolver as a boilerplate or framework for creating your own content slider, exactly the way you want it.

This content slider plugin currently compatible with jQuery and Mootools!

The official W3C validator does not yet provide a way to submit several URLs at once. So, if you want to check your whole website, you need to submit each of your URLs individually, which is a slow process. W3Clove provide a simpler, faster way to submit several pages at once.

W3Clove is a site-wide HTML markup validator. It allows you to check the validity of the markup of several pages from your website, and gives you a summary of the most common errors and warnings, with a single click.

Mobi Pick is an Android-style datepicker widget for jQuery Mobile. It uses the date library XDate and allows progressive enhancement for date input fields using Modernizr.

Mobi Pick has implemented localisation through XDate’s locale support, which means a localised picker can be displayed simply by specifying a language

MASHA (short for Mark & Share) is a JavaScript utility allowing you to mark interesting parts of web page content and share it.

This library allows users to mark page content fragments and get unique url to the page with marked fragments.

Anybody can select chosen parts (paragraphs, sentences or words) and share these selection with others. Opening of that url will open the page with same content and restored marks.