FemtoBeacon is a dime-sized Arduino programmable Wireless IMU (10DoF). Includes USB Host mode, precision altimeter, mesh networking, and more! See FemtoBeacon example sketches.
FemtoUSB is a very small Arduino programmable ARM chip. It supports USB Host mode, and packs a punch! Useful in small places that require a mighty ARM chip. See FemtoUSB example sketches.