ABF UV Unwrap

UV > UV Create > ABF UV Unwrap - An Angle Based Flattening UV unwrapper with the ability to split geometry along selected edges for more complex objects. To use it, select a sequence of edges on your object and hit the button. There are no options.

A single edge segment was selected on the sphere and the right cursor key pressed to select the loop to the poles and then the ABF UV Unwrap button pressed. A UV map is created with the name Unwrap.