bobricius is developing this Arduino Zero compatible project for the Hackaday Prize 2016:

This board have unique compact design and is easy to assemblyBased on newest arduino zero board with powerfull mcu.   Native 3.3V, many sensors, modules and SD cards are working on this voltage level

Features include:

• SD card reader
• RGB LED
• Touch pad
• User button

The board uses the Atmel ATSAMD21E18 microcontroller:

• ARM Cortex-M0+
• 256KB of flash and 32KB of SRAM
• Up to 48MHz operating frequency
• 4 serial comm modules (SERCOM) configurable as UART/USART, SPI or I²C
• Full Speed USB Device and embedded Host
• Support for up to 60 touch channels

The EAGLE board file can be downloaded from hackaday.io:

samd21SLIM-sd-longer.brd