Here is a link: HVAC . Pattern Development
You have, no doubt, found the sheet metal section of Fusion 360. It is free to hobbyist but if you make more than $1000 per year with your products developed in Fusion 360 you no longer qualify for the free version. But, it allows you to “try before you buy.”
As for ‘nesting’, Fusion has a great nesting feature in the paid version but not in the free version. You can still do nesting in the free version, but it is not automated.
Tin can speak for himself but he does all of his work on the Crossfire PRO table.