DigitalOcean is hosting its fourth annual Hacktoberfest, a month-long celebration of open source projects, from October 1. Participants can earn a limited-edition T-shirt and stickers by making four pull requests on GitHub between October 1-31. The event provides resources for contributors to find issues to work on, learn how to contribute to open source, and attract participants to their own projects. Hacktoberfest is an opportunity for developers to give back to the community by reviewing and merging code, with the goal of increasing participation in open source projects. Participants can access a variety of public GitHub-hosted repositories, including those labeled as "Hacktoberfest" issues, and receive digests with resources and project ideas. Reviewing and contributing to open source projects is not only a great way to make a positive impact but also provides valuable experience for developers looking to improve their skills.