OpenMRS is a customizable and free electronic health record platform designed for low-resource environments, compatible with laptops and mobile devices. It acts as a foundational tool for medical informatics in low and middle-income countries, boasting a flexible database structure that allows for extensive customization to suit various medical information requirements. The Reference Application enhances user experience, enabling the creation of tailored medical record systems with minimal programming skills, although some knowledge in medical and systems analysis is beneficial. Organizations can leverage existing community modules or develop new ones, supporting the creation of customized electronic medical record systems for specific needs, particularly in the area of communicable diseases.