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Fighter Drone Mk.I

Simpliest as it can be, imo. Drone-bot, which can track player or ship, follow it and shoot at it. It also can avoid obstacles. Working only in 50m range, ♥♥♥♥♥♥ vanilla.
This is deactivated version, I guess you want to look at it first, instead of defending yourself :D
To activate simple toggle on group "AI systems".
You can use it for many purposes: creating primitive AI enemies in scenarios, make a following freighter-drone or make "traps", by placing one more sensor, which activate whole system, or just spam them and make epic battle :D
You can copy that system to any ship to make it "alive".

Known issues: in multiplayer (when you're not host) it can stupify and be laggy as hell, I guess bad keen netcode is the reason. So it's better for single player scenarios