Open-source hardware means labels are a must. We're so busy admiring the organization we nearly forget about the silicon:

Atmel XMEGA256A3BU MCU

Toshiba TC358870XBG 4K HDMI to MIPI dual-DSI converter (also seen in the Rift CV1 and the Vive)

SMSC USB5534 4-port USB 3.0 hub controller

Bosch Sensortec/Hillcrest Labs BNO070 9-axis orientation sensor and sensor hub

Texas Instruments TPS54478 buck converters

Texas Instruments TPS54427 buck converter

Texas Instruments TXS0104E bi-directional level shifter