Wikipedia
GaiaEHR
GaiaEHR is a Medical practice management software which also supports Electronic Medical Records. GaiaEHR is one of the various open source technologies.
The software suite is written as a web application and includes both server and client. The server is written in PHP and can be employed in conjunction with a LAMP "stack", though other operating systems are supported as well. The client side does not employ a common web browser, but some own software based on the Ext JS JavaScript application framework.
GaiaEHR is free and open-source software subject to the terms of the GNU General Public License (GPL).