1. Quickrr Calendar

Chrome OS lists the time on the upper-right corner of the screen, but clicking it only shows you the present date (and the option to open the time zone setting). What's missing here, and found in most OSs, is a basic calendar. rectifies this. When you click its icon, a big calendar of the current month opens. You can flip through the following and previous months, type in reminders in the date boxes to remind yourself of things you need to do that day, and sort through these days and activities by week or day (which further breaks down your to-do's by hour).

2. Elegant Calculator

There are several calculator extensions for Chrome, but we like because it looks, well, elegant, as a virtual representation of a real number cruncher. Enter numbers and functions either by clicking this calculator's buttons or typing with the keyboard. You can switch between "Basic" and "Advanced" versions -- the latter includes 20 more functions for common trigonometric and scientific calculations.