Devantech USB to UART, I2C, SPI, serial adapter (USB-ISS) | Acroname
UMFT4222EV-D FTDI, Future Technology Devices International Ltd | Development Boards, Kits, Programmers | DigiKey
SPI to 4 X UART Bridge (MULTIUART) : 6 Steps - Instructables
Simply add USB to your design with bridge devices from Silicon Labs
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 to 4bit SPI/FT1248 Breakout Module based on FT220XQ USB 4bit SPI/FT1248 IC - Socket Pin Connection - Ftdi | CPC
CH341 USB To UART, I2C, SPI Parallel Breakout Board - ElectroDragon
USB SPI Slave Breakout Board from Earth People Technology on Tindie
SPI To USB Bridge IC at best price in Chennai by Dynamic Source India Private Limited | ID: 2765391862
Pyroraptor USB I2C SPI Bridge
EVE2 USB to SPI Bridge - Matrix Orbital | Mouser
USB To UART/I2C/SPI/JTAG Converter, Supports Multiple Interfaces, Compatible with 3.3V and 5V, Multiple Protection Circuits, Multiple Systems Support, Aluminum Alloy Case, Wall-mount & Rail-mount Support
FT220XQ - FTDI
AK-MCP2210 – USB to SPI Bridge | Artekit Labs
Buy FT232H - USB converter for UART, SPI, I2C Botland - Robotic Shop
USB SPI click - Breakout board for MCP2210 USB to SPI converter