I prefer to use the keyboard whenever possible. I have a two monitor setup and found myself moving windows from one monitor to the other using the mouse. However, using AutoHotKey I was able to do this by keyboard. Also I wanted to swithc easily to a particular window using the keaboard.

Update: The functionality has now been integrated into Windows 7.

As warm-up to the question of average distance between two points on a circle I’ll start out finding the average distance between two points on a line.

The problem is to deduce how the temperature changes (we will call this a temperature profile) at one place from measurements at another place. You will need a very old browsser for it to work.