PennApps Philadelphia, Pennsylvania, USA The World's Premier College Hackathon $30,000 in prizes Sep 6 – 8, 2013 660 participants
The BookSmash Challenge: Break the Binding Online Use imagination and technology to build software that goes beyond the traditional ways we read and discover books. $25,000 in prizes Winners announced 159 participants
Behavioral Health Patient Empowerment Challenge Online HHS seeks the best existing apps that empower patients to manage their behavioral health (mental health and/or substance abuse disorders). Non-monetary prizes Winners announced 50 participants
MTA App Quest Online See how developers changed the way 8.5 million people commute every day. $50,000 in prizes Winners announced 268 participants
Chart.js Personal Dashboard Challenge Online Optimize your life. Create a dashboard visualizing personal data using Chart.js $1,200 in prizes Winners announced 185 participants
Apps for Working Government Online Get government working. Enter apps to educate people about partisan gridlock and help empower them to do something about it. $2,500 in prizes Winners announced 108 participants
2013 DEBUT (DEsign by Biomedical Undergraduate Teams) Challenge Online The National Institute of Biomedical Imaging and Bioengineering is challenging biomedical engineering student teams to design innovative solutions to unmet health and clinical problems. $30,000 in prizes Winners announced 173 participants
Innovate Health Tech NYC Online NYC challenged local health tech innovators to develop commercially viable technologies to solve urgent health care problems. $50,000 in prizes Winners announced 161 participants
The Tactrick Android Developer Cup Online The Tactrick Android Developer Cup challenged brainy Android developers. Prove yourself as the best app developer. $13,000 in prizes Winners announced 417 participants
NYC Schools Gap App Challenge Online The NYC Department of Education challenged software developers to submit apps and games that enhance math teaching and learning, and engagement for our middle schools. $104,000 in prizes Winners announced 706 participants
Lemonade Challenge Online Be part of the mobile wallet r/evolution with Lemonade. $10,000 in prizes Winners announced 93 participants
ConnectNYC Fiber Challenge Online NYC asked businesses to apply for high-speed broadband at their location. Winners received free fiber build-out to their business, an overall value of up to $7M for all winning businesses. Non-monetary prizes Winners announced 360 participants
Appcelerator Mobile Dev Challenge Online Developers changed the world with their mobile apps … and won $15k! $32,000 in prizes Winners announced 591 participants
The MintChip Challenge Online The Royal Canadian Mint challenged software developers to create apps for MintChip, the evolution of currency. $52,700 in prizes Winners announced 1671 participants
PDF: Applied New York, New York, USA Create an app to enhance our electoral process, help citizens engage in their communities, or help facilitate online activism. $2,000 in prizes Jun 9 – 10, 2012 42 participants
AT&T San Diego Apps Challenge – Ideas Online The public suggested apps for developers to build for the San Diego Apps Challenge. Non-monetary prizes Winners announced 82 participants
AT&T San Diego Apps Challenge Online Mayor Jerry Sanders and the City of San Diego challenged software developers to create apps that use city and partner data to enhance services and quality of life for San Diegans. $47,500 in prizes Winners announced 460 participants
Samsung Galaxy Note S Pen App Challenge Online Samsung is offering $205,000 in cash and prizes for the best Galaxy Note™ apps that integrate S Pen™ functionality to help users capture, create and share like never before. $205,000 in prizes Winners announced 636 participants
Equal Pay App Challenge Online The National Equal Pay Task Force wants your help in building innovative tools to educate the public about the pay gap and promote equal pay for women. Non-monetary prizes Winners announced 257 participants
Healthy New Year Video Challenge Online Participants shared a New Year's resolution to improve their health or the health of a loved one, and showed how they used technology to accomplish their goal. $5,000 in prizes Winners announced 152 participants
MTA App Quest Online The MTA challenged software developers to use MTA data to create new apps that improve the transit experience of its 8.5 million daily riders. $15,000 in prizes Winners announced 124 participants
Apps for Science Online Elsevier offered $35,000 to software developers to create apps and help more than 15 million researchers, medical professionals, librarians and students accelerate science $35,000 in prizes Winners announced 46 participants
HackLolla Online Lollapalooza is challenging software developers to create cool apps that help music fans get the most out of the Lollapalooza experience $5,400 in prizes Winners announced 39 participants
Service Impact Award Online The Corporation for National and Community Service seeks nominations that exemplify the best in national and community service in the key issue areas of the Serve America Act and disaster services. Non-monetary prizes Winners announced 140 participants