FusionAuth has announced its participation in this year's Hacktoberfest, a global event that encourages developers to contribute to open-source projects. To participate, developers need to register for the event and submit PRs to FusionAuth's repositories, which have been tagged with the `hacktoberfest` label. The focus of this year's Hacktoberfest is on FusionAuth's JavaScript repositories, covering various frameworks such as Angular, Express, React, and Vue.js, including examples of authentication mechanisms like authorization code grants, device authorization grants, and single sign-on using FusionAuth's SSO feature.