Here is a smart wearable platform that enables designers to bring their ideas to life faster. Hexiwear is an open source platform with 6 on-board sensors, color OLED display, rechargeable battery, and external flash memory. It is compatible with iOS and Android devices.
The device has a smartwatch form factor. It has an optical heart rate, accelerometer, magnetometer, and gyroscope, so you can use it for your wearable projects. The Hexiwear platform is designed to be expandable, so you can add more sensors. More information is available here.