A light-weight Python-based non-minimalistic OWL to FHIR converter.
TODO: Functional, but doesn't have a CLI, and has some major (albeit simple) outstanding issues.
https://github.com/INCATools/ontology-access-kit/
An ontology toolkit. Has a full-featured LinkML and Python based OWL to FHIR converter, and is likely to be well maintained.
https://github.com/aehrc/fhir-owl
Take a minimalistic approach. Can convert top-level CodeSystem properties, concepts, and also supports some predicates, such as synonyms. Uses Java owl-api.