From for-profit to non-profit: That’s the spin for the second HackDuke hackathon at Duke University this weekend.

Some 300 college students from around the country were selected fro more than 1,000 applicants to come together and crowdsource ideas to help nonprofits.

“This upcoming event will take the hackathon model to the next level,” said Ashley Qian, co-directory for HackDuke. “Not only will programmers be working with each other on cool projects, they will be working with seasoned engineers within their field and experts outside of their field to address real world problems in areas like education, inequality, wellness. The sky is the limit.”

The two-day coding marathon runs Saturday and Sunday.

Coders were selected based on technical skills as well as ”their dedication towards using technology for good,” according to the organizers.

Last year’s winning project was a glove designed to help teach sign language.

Prizes this year will go to nonprofit organizations.