bbox.me helps with boundingboxes. Currently there are two main applications:

http://bbox.me/osm/

- An application that helps You create FME workbenches for extracting Open Street Map data.

http://bbox.me/bbox.html

- An application that helps You compose custom URL’s that need coordinate input. For instance creating WMS and WFS calls.

bbox.me was founded by Peter Segerstedt and Ulf Mansson