OpenEMR

http://www.open-emr.org/ OpenEMR is the most popular open source electronic health records and medical practice management solution. ONC certified with international usage, OpenEMR's goal is a superior alternative to its proprietary counterparts. With passionate volunteers and contributors dedicated to guarding OpenEMR's status as a free, open source software solution for medical practices with a commitment to openness, kindness and cooperation. http://www.open-emr.org/
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GNUmed

http://wiki.gnumed.de/bin/view/Gnumed/InstallerGuideHomeShort GNUmed is a Free/Libre electronic medical record (EMR) for Unix-like systems (BSD, Linux, and UNIX systems), Microsoft Windows, macOS and other platforms. GNUmed aims to provide medical software that respects the privacy of patients and that is based on open standards.  GNUmed is based on third party projects such as free software/open source DBMS PostgreSQL and is written mostly in Python. It is supported by a graphical user inter...
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FreeMed

http://freemedsoftware.org/ FreeMED is an opensource electronic medical record and practice management system which has been developed since 1999.  It was developed under the GPL, and remains free and open for all to modify and use.  The FreeMED Software Foundation is a 501©(3) non-profit corporation, whose primary goal is the betterment of the opensource software community and the world in general through promoting development and adoption of FreeMED and other opensource medical software pro...
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