Adafruit's Open-source Wearable Platform, Flora
ptorrone writes "Limor 'Ladyada' Fried's NYC based Open-source electronics studio, Adafruit, today announced their new open wearable platform called the FLORA (blog post & video). The FLORA is Arduino compatible as well as supporting a variety of sensors and add-on devices including: Bluetooth, GPS, 3-axis accelerometer, compass module, flex sensor, piezo, IR LED, push button, embroidered + capacitive keypad, OLED and more. The first round of hardware is in the hands of testers to create wearable projects."
There's always the AVR GNU toolchain for programming Arduino boards in C. It comes with the (free) WinAVR IDE/Debugger and works with any IDE that can handle GCC et al.
Personally, I can't stand the way TI have tied their products to Code Composer Studio. It's free for some of the cheaper devices but if you want to use it on anything with a bit of muscle you'll be shelling out $500+ just to be able to program/debug the hardware you own.