The Freescale Freedom development platform is a set of software and hardware tools for evaluation and development. The Freescale Freedom KL25Z hardware is a simple design featuring a Kinetis L series microcontroller built on the ARM Cortex-M0+ core.
It features a KL25Z128VLK, a KL2 family device boasting a max operating frequency of 48MHz, 128KB of flash, a fullspeed USB controller, and loads of analog and digital peripherals. The FRDM-KL25Z hardware is formfactor compatible with the Arduino™ R3 pin layout, providing a broad range of expansion board options. The on-board interfaces include an RGB LED, a 3-axis digital accelerometer, and a capacitive touch slider.
More info @ Element14: Freescale Freedom