GNU Health - GNU Health is a Free/Libre project for health practitioners, health institutions and governments.
Med-Quest - Cloud based Clinical EDC with a focus on speed, user interface and collection automation techniques.
ClinCapture - ClinCapture is the only validated electronic data capture software available to sponsors and CROs...
freemd - Dr. Schueler has been an emergency physician, teacher, and author for over twenty five years.
OpenMRS - OpenMRS is a community-developed, open source, enterprise electronic medical record system platform.
Castor EDC - Castor offers you a user-friendly and fully featured application for electronic data collection.