Midbar
Midbar is more than just an open source password vault!
... Uno V1.0: https://www.instructables.com/Midbar-RTL8720DN-Arduino-Uno-Version/
ESP8266 V2.0: https://www.instructables.com/Midbar-ESP8266-Version-V20/
STM32F407VET6 + Arduino Uno Version V1.0: https://www.instructables.com/Midbar-STM32F407VET6-Arduino-Uno-Version/
STM32F407VET6 Version V2.0: https://www.instructables.com/Midbar-STM32F407VET6-Version-V20/
ESP32 V6.0: https://www.instructables.com/Midbar-V60/
Teensy 4.1 V3.0: https://www.instructables.com/DIY-Hardware-Data-Vault-With-Teensy-41/