The COPPER source code is on GitHub: https://github.com/copper-engine/copper-engine

Stable

The current stable release is 4.2.0.
You can download it here.
See what's new.

COPPER is on Maven Central, too. You may use the following to include the COPPER core workflow engine in your Maven project:

<dependency>
    <groupId>org.copper-engine</groupId>
    <artifactId>copper-coreengine</artifactId>
    <version>4.2.0</version>
</dependency>
If you are using Gradle, simply add the following to your dependencies section:
compile 'org.copper-engine:copper-coreengine:4.2.0'
If you are using COPPER with Spring you also need to include copper-spring:
<dependency>
    <groupId>org.copper-engine</groupId>
    <artifactId>copper-spring</artifactId>
    <version>4.2.0</version>
</dependency> 
and likewise for Gradle:
compile 'org.copper-engine:copper-spring:4.2.0'

Development

Currently, we're working on the master branch on release 4.2.
See what's cooking for the next release.

Archive

For older releases, go to our list of releases.