Items

FATE Core doesn't have any, but I think it might be cool if we had some additional mechanics for them (would make craft and resources more meaningful as well). People could gain items through those, or possibly by finding them. Weapons would be necessary to attack in the first place and could give small permanent benefits.

For example, a sniper rifle would probably let you attack someone further away than two zones, while a heavy machine gun would give you a +2 bonus on Guns rolls to provide cover fire, a very well crafted sword would give you a plain +1, and a flamethrower could allow you to spend a fate point to impose the burning aspect on your enemy or your surroundings.

There could also be equipment, which could for example be a computer that has the implant property so you always have it handy, night vision goggles which let you ignore situational compels caused by darkness (but make you extra vulnerable to those caused by bright light), or automated, like a camera that you can set up with a motion sensor.

Vehicles could be armor plated, letting them take more stress, have a turbocharger to drive faster, or maybe they are just amphibious and can drive as well as float.

Lastly, armor is another possibility - similar to d&d kevlar would provide some protection to bullets but little to crushing or stabbing weapons, and would make you slightly less agile. Armor with ceramic plating would help against all attacks but slow you down significantly. Or maybe you get some GITS-like active camo that makes you slightly more hard to spot when moving, and a lot more hard to spot when standing still.

Naturally all of these are more or less made up - it would be up to the GM to decide what exists and what is balanced, but the players (especially those that excell at crafting) could come up with their own properties and improvements for items. I think it'd be a neat addition and another way to customize your character without delving into rule lawyering.