There are 1 repository under r4 topic.
Firely and Incendi's open source FHIR server
FHIR R4 to Swagger Converter Tool
Arduino UNO R4 Minima Soccer forecast with Machine Learning (Edge Impulse)
API for interacting with Renta4 (r4.com)
<r4-app href="https://radio4000.com"> using @radio4000/components
Singularity recipies for singularity-hub
A .Net Core version of FhirStarter - which hopefully can be adjusted to fit with any FHIR versjon