Our phones are full of useful sensors - accelerometer, gyroscope, magnetometer... Every hacker have surely experienced the need to test something with one of these sensors. Usually you take Arduino with a sensor breakout board and you write a small piece of code, which send data to serial line.

But not always you have the sensors you need and the wires are sometimes a limitation. Here comes SensorStreamer - lightweight Android app, which can log sensor data and send them over network to your computer, where you can analyse them e.g. with a simple Python script.