Write your own hex with ease.
D developer Roey Benamotz has created the Lean Mean Programming Machine (LEMPA) - a DIY HAT that includes all the sockets, jumpers and LEDs needed to flash a suite of popular MCUs. Using a custom Python tool and JSON file you can make writing an array of microcontrollers a button press job. Read more details at: https://github.com/rbenamotz/LEMPA.