OpenEMR - OpenEMR is an open source electronic health records and medical practice management solution.
Castor EDC - Castor offers you a user-friendly and fully featured application for electronic data collection.
GNU Health - GNU Health is a Free/Libre project for health practitioners, health institutions and governments.
OpenClinica - OpenClinica is an open source clinical trials software.
OpenMRS - OpenMRS is a community-developed, open source, enterprise electronic medical record system platform.
OnCore - OnCore Enterprise Research system supports efficient processes at academic medical centers, cancer centers, and health care systems.