Maybe this one :

http://www.twistedknotwoodshop.com/software.htm

Axel Grease wrote:
A few years ago, somebody posted a link to a downloadable program that
calculated angles for cutting sections for making cylindrical wooden things
(like dome top/half-round top trunks, round barrels, etc.).
Doe sanyone have that program now?

It was great for the lazy and geometrically out of practice...

Axel