GNU Health - GNU Health is a Free/Libre project for health practitioners, health institutions and governments.
OpenEMR - OpenEMR is an open source electronic health records and medical practice management solution.
OpenMRS - OpenMRS is a community-developed, open source, enterprise electronic medical record system platform.
ClinicMED - Clinic MED, an open source application for Professional Clinic Management licensed under GPL
Castor EDC - Castor offers you a user-friendly and fully featured application for electronic data collection.
Practice Fusion - Web-based Electronic Medical Records (EMR), Electronic Health Records (EHR).