Those interested in more than just being yaou (yet another octoprint user), you may want to have a look here. There is also a special Wiki on Octoprint.
octoprint is one of those great things that starts off as a simple web ui for your printer. But when you scratch the surface there is a whole world of fun hidden in the API, EventHooks and even MQTT support. I have all sorts of great ideas (like building a couple of mood lights for the office and living room that show my printers current state)