I combined a bunch of open source technologies into a system that monitors production in a factory. The technologies include Ubuntu, Arduino, node.js, MySQL and Drupal. Ubuntu takes care of the server and LAMP stack. Arduino collects the data directly from the production machines. Node.js handles the communication between the Ethernet shield on the Arduino and the Ubuntu server. MySQL receives the data from node.js and stores it for display and analysis. Last but not least, Drupal handles the display and distribution of the manufacturing data.
I setup a github project for storing the code for each of the components. https://github.com/chrylarson/OpenFactory