On this site you can find different information regarding:
How to enable safe shut down or reboot of Raspberry Pi when you don't have the remote access or keyboard and display at a hand.
Simple web application which uses websocket is presented. Tested on Raspberry Pi.
Few tips how to make your little fellow more secure.
How to periodically measure temperature with DS18B20 sensors that are attached to Raspberry Pi and store the readings to MySql database.