Some more freeform systems:

Fate, another great "do all" system with like 2 pages of rules, and mitigation against the dice, you can decide to take a malus now to be able to have a bonus later. Though it's not combat focused, but that usually means you can develop your encounters more rather than use braindead agressive enemies all the time, and make combat to the death only a last resort.

Hillfolk, more like theater impro framework.

i've made one if u want it

Did I miss something or has no one even mentioned any One Roll Engine games?

I mean I love me some Fate, and PbtA is great and all. But where are the Better Angels? The Monsters and Other Childish Things? The Dirty Worlds?

GURPS. It has a little bit of a learning curve and some problems with outdated terminology but it is a great system.

idc what anyone says, Blades in the Dark is not a PbtA game. It has like 2 things in common with PbtA systems

Also PbtA systems are great for a story focused games, but they're not exactly tactical and characters tend to be a little static. They focus on story pretty much to the exclusion of everything else. If you want story though go for it, they're great. I prefer more of a balance personally.

Worlds Without Number focuses on sandbox play and strikes a nice balance with story and combat. Stars Without Number is basically the Sci-fi version. Both are free with premium versions that have a bit of nice optional content, like more powerful options for heroic characters and Star Wars style space magic