Melanto Calculator is a unique scientific calculator available as a Chrome extension. What sets it apart is its dual operation display, allowing users to see both sides of the current binary operation. This feature is especially useful for touch-screen Chromebooks, as it provides a visual representation of the calculation until the "=" button is pressed.

For users with keyboards, the calculator supports standard input keys such as numbers, decimal point, addition, subtraction, multiplication, division, enter, escape, and backspace. However, advanced scientific functions are not yet accessible via keyboard shortcuts, though improved keyboard support is planned for future releases.

Originally developed as a real-life example of jQuery Mobile, Melanto Calculator has evolved into a full-featured scientific calculator. While it is still a work in progress, the developer welcomes bug reports, feedback on functionality, and suggestions for new features.

Additionally, the calculator offers three different themes to choose from: black, white, or the original "3D buttons." Users can easily switch between themes by accessing the options page from the extension's popup.

Melanto Calculator is also available in two other versions: as a standalone Chrome app and as a "desktop" app that opens in a separate window, simulating a traditional desktop application. Both versions share the same underlying code as the extension.

Please note that Melanto Calculator is provided "as is" and without any warranties.