OpenEMR is an open source medical practice management application (EHR EMR PMS) featuring fully integrated electronic health records, scheduling, electronic billing, internationalization, free support, a vibrant community, and a whole lot more.
GaiaEHR(Electronic Health Records) is a Open source Web-Based Software for:
Medic Practice management
Electronic Medical Records
Prescription writing and medical billing application
And it can be installed on the following systems:
Unix-like systems (Linux, UNIX, and BSD systems)
Microsoft systems
Mac OS X
And other platforms that can run Apache Web server, MySQL
We have some other projects here in GaiaEHR.org, some private and other are GPL'd.
Demo: http://gaiaehr.org/demo/
user: admin
password: pass
Pennington Firm OpenEMR - Practice management, electronic medical record (EMR), prescription writing and medical billing software licensed under the GPL. OpenEMR supports ANSI X12 medical billing, HL7, and customization of the open source EHR.