Amazon.com: All in 1 USB for ISP Serial Adapter Converters SPI/I2C/IIC/UART/TTL : Electronics
CSR USB-SPI programmer
NI I2C/SPI Interface Device | Testforce
Amazon.com: WSDMAVIS 1Pcs CH341A USB to I2C IIC SPI ISP UART TTL Serial Adapter EPP/MEM Parallel Converter Module : Electronics
Amazon.com: USB Port Converter Module USB Converter Module Serial Parallel to UART IIC SPI TTL ISP EPP MEM Components CH341A : Electronics
Devantect USB to I2C, SPI and Serial interface - RobotShop
AK-MCP2210 – USB to SPI Bridge | Artekit Labs
TOTAL PHASE AARDVARK I2C/SPI HOST ADAPTER | Microchip Technology
DEV-SYS-1808-1A Qualcomm | RF and Wireless | DigiKey
USB SPI click - Breakout board for MCP2210 USB to SPI converter
USB-I2C/SPI/GPIO/PWM/ADC Interface | $19.10 to $89.40
Usb To Spi Adapter Module Usb-gpio/pwm/adc Supports Android Android Master-slave - Switch Caps - AliExpress
Yocto-SPI - USB to SPI adapter (TTL 3.3V or 5V), driver-free
UTS2210 USB to SPI Master HID MCP2210 Converter Adapter GPIO DIY RC Electronic Toy Robot Development Board MCU - AliExpress
Aardvark I2C/SPI Host Adapter - Total Phase
CSR USB-SPI Programmer – Oz Robotics
Total Phase Aardvark | USB to I2C and SPI Host Adapter
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
USB Port Converter Module, USB To UART IIC SPI TTL ISP EPP MEM CH341A Chip USB Serial Port Adapter With Working Status Indicator For Program Debugging - Walmart.com