This one (copied from https://openmrs.org/download/):
Reference Application 2.7.0
292.2 MB at sourceforge.net · Released 20-Dec-2017
Linux, Mac OS X, Windows · Release Notes
Recommended for new people exploring OpenMRS. A self-contained ZIP archive that includes an embedded database and application server, as well the option to install demo data for sample patients. Expand the ZIP archive and run the .jar file to start the Reference Application. Log in with username: admin, password: Admin123.
This is not intended for production use.
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