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
DK-USB-SPI-10225-1A Qualcomm | Development Boards, Kits, Programmers | DigiKey
Amazon.com: USB Programmer Module CH341A Series Burner Chip 24 EEPROM BIOS LCD Writer 25 SPI Flash USB to TTL 5V-3.3V : Electronics
CSR USB-SPI programmer
Usendz@ Uts2210 Usb To Spi Spi Master Hid Device Mcp2210 New Version - Tool Parts - AliExpress
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 SPI Slave Breakout Board from Earth People Technology on Tindie
Yocto-SPI - USB to SPI adapter (TTL 3.3V or 5V), driver-free
Adafruit FT232H Breakout (USB to GPIO, SPI, I²C) | Elektor