Matthew Somerville who made this has a bunch of other awesome things on his website - http://www.dracos.co.uk http://www.dracos.co.uk One I used just yesterday

Matthew Somerville who made this has a bunch of other awesome things on his website - http://www.dracos.co.uk http://www.dracos.co.uk One I used just yesterday was for finding postboxes in the UK given a postcode - http://www.dracos.co.uk/play/locating-postboxes/ http://www.dracos.co.uk/play/locating-postboxes/.