Adafruit FT232H Breakout - General Purpose USB to GPIO, SPI, I2C [USB C & Stemma QT] : ID 2264 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits
6 pin FTDI Cable 5V with CTS and RTS – ThinkRobotics.com
MGTNSY1 - USB to (I2C/SPI/UART/GPIO/PWM/ADC) Cable from skoperst on Tindie
JTAG-USB Cable - Digilent
UM232H-B-WE FTDI - Module: USB | FIFO,FT1248,GPIO,I2C,SPI,USB; cables,USB A | TME - Electronic components