hack:now Online hack:now — Current events and Future solutions $6,240 in prizes Winners announced 880 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 330 participants
Amazon Sumerian AR/VR Challenge Online Create AR, VR, and 3D apps in your browser - quickly and easily $101,845 in prizes Winners announced 1242 participants
