GNU Health - GNU Health is a Free/Libre project for health practitioners, health institutions and governments.
Snthesis - Automatically Integrate and Harmonize all your Research Data into one clean database. Source Agnostic. Search Everything.
OpenMRS - OpenMRS is a community-developed, open source, enterprise electronic medical record system platform.
OpenClinica - OpenClinica is an open source clinical trials software.
drchrono - An EHR built for your specialty:
Genemod - Lab Management Software