Galileo is based on the Intel® Quark X1000, a 32-bit Intel Pentium-class SoC. Designed to be fully compatible with Arduino shields for the Uno R3, Galileo features a large amount of memory, SD Card, PCIe slot, and copious GPIO.
STM32F103 Nucleo Board
The new STM32 Nucleo features the STM32 ARM-based MCU, USB, an on-board programmer/debugger, Arduino UNO R3 compatibility, and additional headers for direct access to all GPIO. Nucleo works with mbed.org and other open tools and SW.
TI’s 430BOOST-1 is a plug-in board for the MSP430™ LaunchPad development kit. Together, they provide capacitive touch solutions with easy control of the low-power C5000™ DSP for crystal clear record/playback of MP3 audio.
Arduino Yún board is the first stand-alone Arduino featuring built-in Ethernet and WiFi. Programming via USB is similar to the Leonardo, since both are based on the Atmel ATmega32u4, but Yun also has an Atheros AR9331.
Freescale i.MX6 Board
The Freescale Wandboard development board is an ultra-low power, complete computer capable of high performance multimedia. Featuring CPU clock speeds of 1Ghz, onboard features include HDMI, GigE, 1GB memory, Wi-Fi, and Bluetooth.
The newest member of the BeagleBoard family is a lower-cost, high-expansion focused board featuring the Sitara AM3359 ARM Cortex-A8 32 bit MPU from TI. Includes a large ecosystem of ready-made hardware interfaces, software, and tools.