Spark

Pricerange: $ 30.00 - $ 40.00

https://www.spark.io/features

Spark's hardware dev kit, the Spark Core, provides everything you need to build a connected product. We combine a powerful ARM Cortex M3 micro-controller with a Wi-Fi module to get you started quickly. The design is open source, so when you're ready to integrate the Core into your product, you can.

Spark Core

8 digital I/O pins, 8 analog I/O pins
8 PWM pins; UART (Serial), SPI, I2C, and JTAG peripherals available
Programmed wirelessly (through Spark Cloud), via USB or JTAG
3.3V DC supply voltage (on board power regulator); can be powered by USB Micro
100mA typical current consumption; 300mA peak consumption (during transmit events)
2MB of external flash; EEPROM supplied by CC3000

Microcontroller

STM32F103 microcontroller
ARM Cortex M3 architecture
32-bit 72Mhz processor
128KB of Flash, 20KB of RAM

Wi-Fi module

Texas Instruments SimpleLink CC3000
802.11b/g
Range of 100-300 feet