FM24CLXX FRAM Board FM24 F-RAM Serial board with I2C interface FM24CL on board - AliExpress
SC402 I2C Memory Module Kit from Stephen C Cousins on Tindie
Adafruit 24LC32 I2C EEPROM Breakout - 32Kbit / 4 KB - Stemma QT : ID 5146 : Adafruit Industries, Unique & fun DIY electronics and kits
Designing with I2C F-RAM™
Adafruit I2C Non-Volatile Ferroelectric Ram Breakout - 256Kbit / 32KByte for 3V or 5V Power and Logic or FRAM Storage to DIY Project 1895: Amazon.de: Computer & Accessories
DS1338C-33#TR I2C RTC with 56-Byte NV RAM | Wilwin