Calculate This
Calculate This is a calculator application written using jQuery, CSS3 and HTML5. The app is themeable by using custom CSS files and will run in Webkit and Gecko be browsers that support HTML5. The app can be run in the browser as a web page or it can be run in Chrome as an extension. The extension is not on the extension gallery but can be downloaded here and added to your browser.
Calculate This can be controlled by using the buttons provided but also supports standard keyboard buttons too.
There are a few flavours of the app, pick an choose: