Scottish composer James MacMillan (b. 1959) wrote a piece for orchestra entitled The Confession of Isobel Gowdie, based, of course, on the story of Gowdie’s trial. I used to listen to this a lot in college, before I got into witchcraft. It’s funny how life works out sometimes. I’m listening to it again for the first time in several years with a renewed appreciation for it.
There’s also an opera, but the bastards over at youtube took in down a few years back and I’ve never been able to find a working link since