ElecFreaks GVS GPIO Shield for Raspberry Pi
Price in Singapore Dollars, including 7% GST of $0.82
The RPI GPIO Shield turns Raspberry Pi GPIO into the normally-used Arduino I/O interface. The shield not only maintains most of the Arduino UNO I/O interface, but it also expands IIC interface. The RPI GPIO Shield has all the UNO I/O features, which can be used to drive LED, sensors, LCD and other electronic modules and components.