Develop Your First Google Chrome Extension Using HTML and jQuery

Chrome extensions are small programs (using HTML, JavaScript, jQuery), written basically to add additional functionality to the Chrome browser. You can download and find all Google Chrome Extensions in the Chrome Web Store (formerly the Google Chrome Extensions Gallery). As per Wikipedia, by February 2010 over 2,200 extensions had been published by developers.
If you check the Chrome web store, you will find a lot of Chrome extensions. You can check this out using this link.