OctoPrint plugin that connects OctoPrint to the Polar3D cloud. You easily monitor your printer from outside your LAN without arcane setup of port forwarding, etc. Plus, take advantage of the rapidly evolving Polar Cloud capabilities and UI.
CuraEngine is a powerful, fast and robust engine for processing 3D models into 3D printing instruction for Ultimaker and other GCode based 3D printers. It is part of the larger open source project called "Cura".