There are 2 repositories under taxii-server topic.
TAXII server implementation in Python from EclecticIQ
An OpenTAXII Configuration for MISP
TAXII Server supporting the 2.1 spec.
SpringBoot implementation of TAXII server backed with BPMN configuration
TAXII 2.0 Server implemented in Node JS with MongoDB backend
External Task Worker for TAXII-springboot-bpmn https://github.com/StephenOTT/TAXII-springboot-bpmn
TAXII docker image for Datalake feed ingestion
A Service Now OpenTAXII Server Integration