I'm on the verge of breaking down and buying a license for Moment of Inspiration 3D since it was designed for use on tablet computers (which is my preferred sort of hardware).
* a keyboard's shift key and a right mouse button, or * a middle mouse button, or * a 3D mouse.
I've done some work in SolveSpace with a Wacom tablet, by binding the stylus's buttons to the middle and right mouse buttons. SolveSpace is a pretty simple program, so you don't need to dig deep through the UI to get to all the functions. Lost of the often-used functions have keyboard shortcuts, but I don't think there is anything that is only accessible through the keyboard.
Depending on what you aim to do, you might be interested in keeping up with Blender's currently-in-development tablet mode:
I'll keep experimenting w/ this in mind for the next time I'm using my Wacom One attached to my MacBook.