The MCP23008 is a Integrated port expander that controls eight I/O channels through the I2C bus.
NCD.io provides several board that utilize this chip, most of our larger I2C and IoT Relay Boards, 16 channels and up, use the MCP23017. The smaller boards, 8 channels and smaller use the MCP23008.
The 8-channel I2C relay controller pictured above can be found here
You can find additional information about this repository in the programming language folders.