PIC-GSM is a great development board for cellular and remote monitoring applications.
With it, you can easily monitor and control your home from anywhere there is cell phone coverage with your GSM cellular account.
Insert any GSM SIM card and start accessing this board remotely over the cellular network.
Switch on and off relays remotely by SMS, monitor and toggle the status of any GPIO pin, speak or listen on the audio channel of the board, even monitor the built-in temperature sensor.