HackAmerica Online America's Largest Hackathon for High School Students $575 in prizes May 23, 2026 02:00 PM EDT to submit 360 participants
GNEC Hackathon 2025 Spring - Compete For UN-Affiliated/NGO Internships & Prizes Online Create projects benefiting UNSDGs for a chance to work along UN affiliated NGOs! $10,000 in prizes Winners announced 1654 participants
