fhir-spec
There are 4 repositories under fhir-spec topic.
FirelyTeam/firely-net-sdk
The official Firely .NET SDK for HL7 FHIR
FirelyTeam/spark
Firely and Incendi's open source FHIR server
dcarbone/php-fhir
Tools for consuming data from a FHIR server with PHP
fhir-fuel/fhir-fuel.github.io
Place to prepare proposal to FHIR about JSON, JSON-Schema, Swagger/OpenAPI, JSON native databases and other JSON-frendly formats (yaml, edn, avro, protobuf etc) and technologies