GNU Health - GNU Health is a Free/Libre project for health practitioners, health institutions and governments.
Castor EDC - Castor offers you a user-friendly and fully featured application for electronic data collection.
ClinCapture - ClinCapture is the only validated electronic data capture software available to sponsors and CROs...
Medidata CTMS - Medidata CTMS seamlessly integrates with Medidata Rave to provide real-time views into study progress without manual tracking.
Med-Quest - Cloud based Clinical EDC with a focus on speed, user interface and collection automation techniques.
OpenClinica - OpenClinica is an open source clinical trials software.