Over on Reddit, u/ThreeDaysGuy announced a new Godot-based combat manager that they've been working on for Pathfinder 2e. Unlike the vast majority of PF2e tools, this one's an actual, honest-to-goodness desktop application.
It's still rather young, and it's not feature complete yet. It's pulling creature data from the PF2 Foundry module, and is a few months behind on updating that.
The author has Windows binaries up for download on Itchi.io, but the program is platform neutral. They just don't have any pre-compiled binaries for Linux or Mac yet (you can build your own using the Godot compiler). The code repository can be found here: https://github.com/Zain-A-Abbas/PF2E-Combat-Driver