Hacktoberfest is a month-long celebration of open-source software by DigitalOcean that encourages participation in giving back to the open-source community. Developers get involved by completing pull requests, participating in events, and donating to open source projects.
Hacktoberfest is an event hosted by DigitalOcean that partners with many organisations. The goal is to give back and contribute to open-source projects. The organisers offer little incentives for a job well done, like a shirt and stickers.