Yocto-SPI - USB to SPI adapter (TTL 3.3V or 5V), driver-free
CH341A USB To UART IIC SPI TTL ISP EPP/MEM Parallel Port Converter Module Onboard Operating
USB-I2C/SPI/GPIO/PWM/ADC Interface | $19.10 to $89.40
USB to I2C/IIC/SPI/UART/TTL/ISP Adapter Module EPP / MEM Parallel Port Converter For Serial Brush Debugging
DLN-2 USB-I2C/SPI/GPIO Adapter
CSR USB-SPI Programmer – Oz Robotics
USB SPI Slave Breakout Board from Earth People Technology on Tindie
Ch341a Programmer Usb To Uart Iic Spi I2c Convertor Parallel Port Converter Onboard Operating Indicator Lamp Board Module - Integrated Circuits - AliExpress
Amazon.com: WSDMAVIS 1Pcs CH341A USB to I2C IIC SPI ISP UART TTL Serial Adapter EPP/MEM Parallel Converter Module : Electronics
iConnectivity : USB HOST TO SPI CONVERTER MODULE
DLN-4S Multiprotocol Master & Slave 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
DK-USB-SPI-10225-1A Qualcomm | Development Boards, Kits, Programmers | DigiKey
USB SPI click (MIKROE-1204) | MIKROELEKTRONIKA PCB Extension Board| 156623
Amazon.com: USB to JTAG UART Module, USB to Serial Port Module, High Speed USB to JTAG UART/FIFO SPI/I2C, Multifunction USB to FIFO SPI/I2C Module, with 3Pin Header : Electronics
Amazon.com: EC Buying FT4232HL 4 Channel USB to Serial Adapter FTDI FT4232 UART SPI I2C JTAG RS485 RS422 RS232 to USB High-Speed Multifunction Serial Adapter Module Support Multi Systems for Windows XP
Embedded Adventures - Products - MOD-1013 MCP2210 USB to SPI module
Devantech USB to UART, I2C, SPI, serial adapter (USB-ISS) | Acroname