Adafruit 16-Channel 12-bit PWM/Servo Driver - I2C interface - PCA9685
SparkFun Differential I2C Breakout - PCA9615 (Qwiic)
Adafruit TPL5110 Low Power Timer Breakout
TCA9548A I2C Multiplexer
Adafruit 16x9 Charlieplexed PWM LED Matrix Driver - IS31FL3731
SparkFun Qwiic Mux Breakout - 8 Channel (TCA9548A)
Adafruit PCF8523 Real Time Clock Assembled Breakout Board
SparkFun Opto-isolator Breakout
Adafruit DS1307 Real Time Clock Assembled Breakout Board
DeadOn RTC - DS3234 Breakout
