Zoomy is a quick and easy jQuery image zoom plugin that will zoom into an image. You only need two copies of one image first the display image and then the zoom image.

This open source jQuery image zoom plugin is simple, easy to implement and customize. There are a few options that allow you to change the appearance and usability of Zoomy. Get a extra level of detail without boging down your page with gaint images.

Highlighter WordPress plugin allows your readers to highlight any word, sentence, paragraph, or image and then comment or share on that highlight.

It allows publishers and readers to engage in more contextually-relevant conversations.

You’ll capture more social sharing and more conversation, which in turn improves user experience and increase visitor time spent on site.

Max A/B is a Free WordPress plugin that lets you perform A/B testing within your WordPress. It lets you create split test experiments in a matter of minutes.

A/B testing gives you more flexibility and insights when it comes to testing your marketing tactics. With Max A/B, you can create an unlimited number of experiments, pause and re-start at any time. Metrics are captured and calculated in real-time.

jQuery Toastmessage is a jQuery plugin which provides android-like notification messages. It’s a quite nice way to report info or error to the user.

You have 4 different toast types you can use. Each type comes with its own icon and colored border. The types are:

• Notice
• Success
• Warning
• Error

You can easily customize the notification positioning, the required user action and the CSS rules.

jLabel is a jQuery plugin that formats text input fields with unobtrusive labels featuring interactive suggestions. It allows input fields to be labelled clearly and presented with minimal interface obstruction.

jLabel adheres to the concepts of Progressive Enhancement and Graceful Degradation and correctly handles pre-populated fields and ASP.NET’s viewstate postback model.

jLabels are kept visible until the input field’s first character is typed and are reinstated as soon as the input field’s final character is deleted.

jQuery File Upload is an open source extensible jQuery plugin that supports multiple file upload with lots of useful features including drag and drop, upload progress indicator and cross-site file uploads.

jQuery File Upload implementation is based on open standards like HTML5 and JavaScript and requires no additional browser plugins. This plugin uploads files via XMLHttpRequests (if supported) and uses iframes as fallback for legacy browsers.

It is compatible with any server-side application platform and works well with Google App Engine (Python, Java), Ruby on Rails, PHP and any other platform that supports HTTP file.

jRating is a flexible jQuery plugin for creating star rating systems with complete Ajax treatment.
jRating is very easy and simple to use, with many options and methods.

It comes with great flexibility and you can set the star size, number of stars and maximal rate.

Recommended: Open Source Feedback Collection and Polling Widget

An easy to use jQuery slideshow WordPress plugin that helps you create an instant image gallery for your WordPress.  With this plugin you don’t have to code anything: just write your post with the usual wysiwyg editor in WordPress and activate the slideshow, you are done.

Re-arrange the images in the slideshow straight below your post with a simple drag ‘n’ drop interface. No cut, no paste, no numbered images, no metabox. Manage and customize transitions and timings on the fly.

The HTML5 Extension for Windows Media Player Plugin-in for Firefox is an add-on that enables Firefox users to play H.264-encoded videos on HTML5 pages by using the built-in capabilities found in Windows 7.

The plug-in looks for HTML5 video tags and passes the video to the Windows Media Player plug-in for playback.

This Extension adds to the functionality of the extremely popular earlier Windows Media Player Plug-in for Firefox to enable web pages that use the emerging HTML5 standard.

Guides are useful for laying out elements symmetrically, structure a design and improving the overall layout.

foxGuide is a firefox extension that displays horizontal and vertical guides in your firefox browser. Guides will appear as thin lines that float over the webpage. You can move or remove them just the way you do it Photoshop.