At the TechCrunch Disrupt Hackathon in London, a contest was held to develop apps inspired by the Marauder's Map from Harry Potter, utilizing technologies such as PubNub BLOCKS, Mapbox, and IBM Watson. Participants created innovative applications that captured the essence of the magical map, which shows real-time locations, detects secret passageways, and provides verbal feedback. Noteworthy entries included Marauder’s Battle, which won the contest for its interactive map and spell-casting features, and Marauders.tech, an RPG game allowing players to hunt for potion ingredients using augmented reality and photo recognition. Other creative submissions like Marauder’s Map and Marauder Tours focused on communication and location-based messaging, as well as managing guided tours, respectively, while Marauder’s Magic explored augmented reality with a custom map design. The event showcased a variety of applications that merged the mystical with cutting-edge technology, promising more future contests and innovative creations.