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
Devantech USB to UART, I2C, SPI, serial adapter (USB-ISS) | Acroname
USB to I2C IIC SPI UART TTL Converter Module STC ISP Adapter ALL IN 1 | eBay
Devantect USB to I2C, SPI and Serial interface - RobotShop
USB to I2C/IIC/SPI/UART/TTL/ISP Adapter Module EPP / MEM Parallel Port Converter For Serial Brush Debugging
Yocto-SPI - USB to SPI adapter (TTL 3.3V or 5V), driver-free
CH341A Programmer USB to UART IIC SPI I2C Convertor Parallel Port Conv – diymore
Devantech USB to UART, I2C, SPI, serial adapter (USB-ISS) | Acroname
Buy JUMO 00553388, PC Interface Cable with Converter USB/SPI - Prime Buy
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
iConnectivity : USB HOST TO SPI CONVERTER MODULE
CSR USB-SPI Programmer – Oz Robotics
CH341A Programmer Convertor Parallel Port Converter USB to UART SPI I2C Onboard - Walmart.com