GNU Health - GNU Health is a Free/Libre project for health practitioners, health institutions and governments.
Clinicea - Clinicea offers practice management and EMR solution for doctors, clinics, and hospital OPDs.
OpenEMR - OpenEMR is an open source electronic health records and medical practice management solution.
American Medical EMR - American Medical EMR is an all in one electronic record management software that allows you to do healthcare task quite effectively.
drchrono - An EHR built for your specialty:
Clinic Sense - Clinic Sense is a dynamic message clinic management software that empowers to reduce the time at the management work expertly.