Facebook Hackathon: AR Online Augment your world with Spark AR $7,000 in prizes Winners announced 1730 participants
MLH Local Hack Day: Build 2019 Join your local tech community & 200+ other communities around the world for a global 12-hour hackathon & celebration of learning, building, & sharing! Non-monetary prizes Nov 29 – Dec 15, 2019 333 participants
