It appears to be more than just a competitor of Mythic GM Emulator. Almost like a hybrid between a GM Oracle and a Personalized VTT (Virtual Table Top) environment. And for 14 Euros, that's not bad either.
Update. So, there are actually two products here, and I conflated the two of them. There's PUM (Plot Unfolding Machine) which is ... kind of a rival of Mythic Game Master Emulator, but not really? And there's PUMc (The community capitalizes the C), for (Plot Unfolding Machine Companion), and this is a software that can be run on Windows and Linux, as well as Android and iPhones.
My initial impressions of PUMc: Absolutely amazing! This is like the perfect writer's prompt for when you've hit that Writer's Block wall. With the click of a couple buttons, maybe a dice roll, I've already thought up of an opening scene to kick off a new game! It's a very flexible software, and I'm really liking the Cards and Decks extension! Now I can finally use my GMA cards in a virtual environment. I also put in my anime tarot deck too. Creating a table is super simple too. It even has Weighted Entries out of the box.