OpenEMR is a Free and Open Source electronic health records and medical practice management application. It is ONC Complete Ambulatory EHR Certified and it features fully integrated electronic health records, practice management, scheduling, electronic billing, internationalization, free support, a vibrant community, and a whole lot more. It can run on Windows, Linux, Mac OS X, and many other platforms.

The setup documentation can be found in the INSTALL file and extensive documentation and forums can be found on the OpenEMR website at: http://www.open-emr.org