MSP430
TI Launchpad / MSP 430 Development

TI Launchpad is a very cheap (4 Eur per board incl. mini-USB cable!) alternative to Arduino based on TI MSP430 MCU.
Links
Energia - Arduino IDE clone for MSP430 osx-launchpad - MSP toolchain for OS X
TI Launchpad is a very cheap (4 Eur per board incl. mini-USB cable!) alternative to Arduino based on TI MSP430 MCU.
Energia - Arduino IDE clone for MSP430 osx-launchpad - MSP toolchain for OS X