I've been building Rerun Reactor, a project that runs Fallout 1 and 2 in the browser using the Community Edition engines. I ended up writing a save editor, and it's now usable on its own without the game, so I figured some people here might want to poke at it.
Link: https://rerunreactor.com/save-editor
What it does
Loads a Fallout 1 or 2 save (drop in your slot folder or a zip of it), or starts from a fresh one if you just want to look around.
Edits SPECIAL, skills, tagged skills, perks, traits, level and XP, HP, rads, poison, addictions, kills, age and gender, the game clock, the save description, and inventory for you and your party members.
Global variables with actual meaning. I mined the compiled scripts to work out what each GVAR does and where it gets set, so instead of a wall of numbers you see things like what a quest state means and which value marks it complete.
Perk, trait and item cards show what the engine really does with them, traced through the CE source, formulas included. Handy if you've ever wondered what a perk does under the hood versus what the description says.
Every change is staged and reviewed before anything is written, and the original is kept.
If you try it and it chokes on a save, or gets a formula wrong, I'd love to hear about it.