You can download the latest version 3.0 from Github. The Civilian distribution including source and documentation
civilian-3.0.jar The Civilian jar file The Civilian source
civilian-3.0-samples.war The Civilian samples, packaged as WAR file
Older versions can be found here.

System requirements

You need a Java JDK (8+) and a servlet container (3.0+), like Apache Tomcat or Jetty to run Civilian applications.