GetShopped is a free WordPress plugin for adding e-commerce capabilities into WordPress-powered websites . It is a very easy-to-setup plugin which can work with any standards compliant WordPress theme (and WordPress MU).
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WordPress Plugin For E-Commerce: GetShopped
Using JavaScript, it is possible to load HTML, XML or JSON data with XMLHttpRequest. However cross-domain JavaScript requests (reaching remote pages) are not possible due to browser security limitations except JSONP-formatted JSON data . Simple PHP Proxy is a PHP script which aims to fill this gap by creating a layer between your JavaScript code and the remote domain to get data in HTML, XML or JSON formats
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Cross-Domain JavaScript With Simple PHP Proxy
Footers of websites are being used more & more effectively everyday to provide a better navigation and more information. Footerama is a fresh design gallery which presents inspiring footers of beautiful websites
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Website Footer Inspiration: Footerama
Lilina is an open source PHP application for aggregating feeds from a web-based interface. It supports RSS, Atom & podcasts inside them
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Open Source PHP-Based News Aggregator: Lilina
E-mails are one of the key elements of a website/web application. They are used in contact forms, sign-ups, notifications, newsletters, etc.
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Tips For Sending Valid E-mails From Websites
Markercss is a complete CSS framework for creating website layouts quickly. It comes with a set of stylesheets: layout, borders, backgrounds, links, forms, text, colors & tables which makes it possible to use only what is needed. The framework has a combination of references like adding a w10 class (10-1000 is defined) will make an element 10px or p5 (5-50 is defined) will add a 5px padding
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A Complete CSS Framework: Markercss
Brosho is a jQuery plugin which helps you to minimize the editor-browser switching while creating/editing websites. It enables you to select elements in a webpage, edit the CSS properties with an in-browser editor & see the outputs instantly (similar to editing with Firebug). Once you are satisfied with the changes implemented, copy-pasting the new code to the CSS file is enough
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Brosho: A jQuery Plugin For Designing In The Browser
Grimace is a free Flash-based component for displaying emotions through facial expressions.
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Grimace: Display Emotions Through Facial Expressions
Images are best presented and more manageable to the viewer if you add a visually appealing effects to your gallery and make it more easier to navigate. I have listed here the best JavaScript image galleries and also included some of the best tutorials on how to make one and use them in your own
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Ultimate Reference of Javascript Image Galleries and Slideshows
Ruby on Rails is a web application framework that promotes rapid development.

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A Simple Twitter App with Ruby on Rails - Messages With Ajax