I'm a big fan of Mythic GME 2ed. The chaos factor with the interrupted and altered scenes add more flavour and sometimes good twists. The only difference I implement, and it's also part of the suggested variations, is resetting the chaos factor when values are too low and the game gets dull and boring to add some surprises.
I also have got some nice games with the Adventure Crafter, getting the story to unexpected places.
And both in their deck formats are not praised enough.
For Ironsworn Starforged (and other games and supplements) I like to use pen and paper. I tried the Stargazer app for some time, and it's great, don't get me wrong, but my imagination works better when I'm away from screens.
I recently tried the Hex Flowers like this one (while playing Cairn - Barrow Delver) with pretty good results. I seriously recommend to give them a try and check the included example, easier than it looks!