I²CDriver

Excamera Labs I²CDriver is an easy-to-use, open-source tool for controlling I²C devices. The device works with Windows, Mac, and Linux and has a built-in color screen that shows a live "dashboard" of the I²C activity. The I²CDriver uses a standard FTDI USB serial chip, so no special drivers need to be installed. The board includes a separate 3.3V supply with voltage and current monitoring.