On the left you’ll see a list of useful documentation related to the core tools and repositories.
The main community chat for the FHIR project is hosted on Zulip and can be accessed by anyone. This is a great place to ask questions to other members of the FHIR community, and collaborate on projects.
Most of the core documentation not directly related to the codebase itself is located on the Confluence page.
All other community links, registries, and services are listed on the fhir.org website.