OM Open-source multimeter is a hobby project of mine which is intended to do a multimeter's job and measure volt,ampere,ohm,capacitance and ... . the features would be high precision,plotting,computer connectivity,and of course being open source.
Accelerometer-based wireless wind and rain sensor.
This is a university project that aims to create a partial weather sensor (rain + wind) using just one accelerometer (LIS302DL), a PIC (18f2520), two ZigBee 802.15.4 modules and a PC.