Top 3 omop open source projects

Data-Quality-Analysis
The PEDSnet Data Quality Assessment Toolkit (OMOP CDM)
OMOP2OBO
OMOP2OBO: A Python Library for mapping OMOP standardized clinical terminologies to Open Biomedical Ontologies
mimic-omop
Mapping the MIMIC-III database to the OMOP schema
1-3 of 3 omop projects