HackAmerica Online America's Largest Hackathon for High School Students $575 in prizes May 23, 2026 02:00 PM EDT to submit 419 participants
GNEC Hackathon 2025 Fall - Compete For UN-Affiliated/NGO Internships & Prizes Online Create projects benefiting UNSDGs for a chance to work along UN affiliated NGOs! $700 in prizes Winners announced 916 participants
