Kiroween Online Build something wicked for Kiroween, our annual Halloween-themed hackathon where developers dare to code in dark mode $100,000 in prizes Winners announced 4979 participants
2025 UXC NYU Design-a-thon Brooklyn, NY, USA 24 hours, 1 challenge, 0 code — craft AI solutions for sustainability. Build your portfolio, win prizes, and design for real impact. $200 in prizes Nov 8 – 9, 2025 92 participants
RevenueCat Shipaton 2025 Online Ship apps and start making money. $355,000 in prizes Winners announced 51899 participants
