The OpenMRS community works to improve healthcare in developing countries where diseases like AIDS, tuberculosis, and malaria are prevalent. They create open-source medical software that can operate in resource-constrained environments and adapt to local needs worldwide. Originally intended to fix a single Kenyan clinic's database, OpenMRS has grown and is now used in clinical and research settings globally. The community is made up of volunteers from various backgrounds working together to build flexible technology platforms to support healthcare delivery.