In my freshman year of high school my grade organized and ran an exhibit on pre- World War II Jewish life in Europe, as a part of the international organization Centropa. My part in the exhibit was the creation of a digital sign-in book and projected map that allows the visitors to type in their name and ancestor's country of origin, and have their location marked on a digitally projected map of the world. I collaborated on this project with a classmate.
This project was comprised of two separate components which communicated through a RESTful HTTP API server backend. The first was a fullscreen GTK+ app which captured sign in data (when typed in via my laptop running the program). The second was a fullscreen web page projected on a wall which displayed a map of the world and dropped pins whenever a new sign in was pushed to it by the backend server.