Yelp Hackathon Online Build the next generation of local apps with the Yelp API $8,500 in prizes Winners announced 714 participants
SAMHSA's Opioid Overdose Prevention Challenge Online Submit an innovative tool or app to prevent opioid-related overdoses. Win cash. Help save lives. $22,500 in prizes Winners announced 77 participants
GBIF Ebbe Nielsen Challenge Online Bringing biodiversity information to life €6,000 in prizes Winners announced 119 participants
King Abdullah Economic City Apps Challenge Online Be among the first wave of developers to help shape the digital layer of King Abdullah Economic City. $50,000 in prizes Winners announced 156 participants
Patient Engagement App Challenge Online Transform the clinical trial experience for patients — submit apps that educate, engage, and empower participants enrolled in clinical studies. $24,000 in prizes Winners announced 221 participants
AIG Rugby Innovation Challenge Online Powering the world’s passion for Rugby, AIG invites you to tackle big data and create apps that bring rugby to the masses. $85,000 in prizes Winners announced 189 participants
Media Mash 2012 Online NYC Media Lab challenged developers to drive media innovation by mashing up APIs, feeds, and data from New York City media and technology companies. $10,000 in prizes Winners announced 185 participants