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
I2C Toggler – Whitebox Labs
UMFT200XD-01 FTDI, Future Technology Devices International Ltd | Development Boards, Kits, Programmers | DigiKey
I2C Interface Support from Instrument Control Toolbox - Hardware Support - MATLAB & Simulink
CP2112 USB to I2C communication board CCS811 debug board USB to SMBus I2C module - Buy and Sell Hardware Products, DIY Electronics and Kits, HuaQiangBei Online Store - PCBWay
EVKT-USBI2C-02 - Monolithic Power Systems (mps) - Evaluation Kit, USB to I2C /PMBUS
Yocto-I2C - USB to I2C adapter, driver-free
USB-to-UART/I2C USB RTC for Raspberry Pi from SB Components on Tindie
Devantect USB to I2C, SPI and Serial interface - RobotShop
FT201XS - FTDI
CP2112 Debug Board USB To I2C Communication Module - AliExpress
Adafruit WCH CH9102F Friend - USB to Serial Converter : ID 5568 : $4.95 : Adafruit Industries, Unique & fun DIY electronics and kits
UMFT4222EV-D Ftdi, Development Board, USB 2.0 Hi-Speed to QuadSPI/I2C, FT4222H | Farnell Switzerland
USB to I2C Converter - RobotShop
R0K5R8C3MDU30BR - R8C/3MK Group USB-to-Serial Communication Conversion Demonstration Board | Renesas
ATUSB-I2C-AUTO-PCB | Microchip Interface Adapter Board for Touchscreen Controllers, I2C to USB | Distrelec Switzerland
CP2112 Debug Board USB To I2C Communication Module - AliExpress
MMR902A34A I2C BOARD Mitsumi Electric Company Ltd | Development Boards, Kits, Programmers | DigiKey
Codemercs Webshop - USB to I2C and SPI Dongle
UMFT201XB-01 Ftdi, USB to I2C Breakout Module, USB Battery Charger Detection, 3.3V O/p | Farnell Switzerland
MGTNSY1 - USB to (I2C/SPI/UART/GPIO/PWM/ADC) Cable from skoperst on Tindie
CP2112 Debug Board USB To I2C Communication Module - AliExpress