This site allows you to run many versions of web browsers (as well as other software) via a virtual machine running on your web browser itself.

This free video player works with HTML5 and also Flash and in any browser. It also has a plugin for WordPress.

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This site teaches you how to create pinned sites compatible with IE9 and above.

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This plugin incorporates a full-fledged shopping cart with online payment support.

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This article has review of several CMS software.

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Google has made many custom fonts accessible using a CSS include. This can be used to include fonts on a web page without having to use images. This is useful for SEO while maintaining a good look and feel for the site.

More info on Google’s web fonts

Google web fonts page

This PHP class allows you to generate native Excel 2007 files using PHP. The class uses Microsoft’s OpenXML standard.

Download the PHPExcel class

This article explains how to embed videos using HTML5 (without using Flash). This technique is useful for sites that need to be iPhone/iPad compatible.

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Google provides lots of embeddable tools for websites such as embeddable Calendar, chat box, custom search etc. Click here to see more tools.

Also check Google’s Page Speed Firefox add-on which tells you how quickly your pages load and how to optimize the pages.

This WordPress plugin allows you to create a social network within WordPress.

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