OpportunityBox
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OpportunityBox

An open-source directory of conferences, workshops, trainings, fellowships, volunteer positions, and calls for papers from around the world, with deadlines, funding info, and application links in one place.

Open source on GitHub, support us with a ⭐

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  • All opportunities
  • Fellowships
  • Calls for papers
  • Fully funded
  • Submit an opportunity

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One email a week: new opportunities + deadlines closing soon.

MIT licensed · Created by S M Asif Hossain · Built by the community, for the community

Explore opportunities

1 open opportunity worldwide, updated continuously.

Hackathon
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NASA International Space Apps Challenge

The world's largest global hackathon: 48 hours solving challenges using NASA's open data, in hundreds of cities and online. Open to all skill levels.

OnlineNo fundingDue Nov 11, 2026