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.
