ClinCapture - ClinCapture is the only validated electronic data capture software available to sponsors and CROs...
Castor EDC - Castor offers you a user-friendly and fully featured application for electronic data collection.
ClinicMED - Clinic MED, an open source application for Professional Clinic Management licensed under GPL
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.
OnCore - OnCore Enterprise Research system supports efficient processes at academic medical centers, cancer centers, and health care systems.