Hi! I am Grace Potma, Director of Product for OpenMRS, here with @Nethmi_Rodrigo as well 
OpenMRS is an open-source, community-driven electronic health record (EHR) system. It’s designed particularly for resource-constrained environments like Low- and Middle-Income countries. OpenMRS is used in over 80 countries and has been used in the care of >22 million patients. Over 4,000 articles have been published that used OpenMRS for various forms of research.
The OpenMRS Global Support Team is currently working on a project to make our EMR’s data easier for researchers to use. More on that project here - we’d love to hear from any interested people! 
OpenMRS and OMOP CDM: Making EMR data easier to use for Researchers in LMICs