Is anyone interested in cutting dovetail joints?

[Ger21]

Looks okay.
When you say "standalone app", I don't know what that means anymore in light of mobile devices etc., what platform does the app run on ?

It's a windows program, and it runs on Windows XP to Windows 8.1. I've seen two Mach3 wizards for dovetails, but decided that a separate program was a better way to go. It outputs both Mach3 g-code and native Shopbot code. The Mach3 code should run in LinuxCNC as well, as it's pretty basic.

One problem is the length of timber that can be cut, the spindle really needs to hang over the end of the bed to get some height below it.

Yes, you need a method to mount the workpiece vertically, and the spindle needs to extend out past the workpiece by about the tool diameter. My current machine can't do this, so all my testing is done with short pieces on a fixture I made.