Castor EDC - Castor offers you a user-friendly and fully featured application for electronic data collection.
OpenClinica - OpenClinica is an open source clinical trials software.
GNU Health - GNU Health is a Free/Libre project for health practitioners, health institutions and governments.
Clinical Conductor CTMS - Clinical Conductor is designed to accommodate the unique needs of organization & conduct clinical research.
Longboat - Cloud-based clinical trial management
Med-Quest - Cloud based Clinical EDC with a focus on speed, user interface and collection automation techniques.