You can use the code from these repositories to experiment, test, build, create patches, issue pull requests, etc.
https://github.com/eclipse/iottestware - Project repository hosted on GitHub.
https://github.com/eclipse/iottestware.coap - Project repository hosted on GitHub.
https://github.com/eclipse/iottestware.mqtt - Project repository hosted on GitHub.
https://github.com/eclipse/iottestware.fuzzing - Project repository hosted on GitHub.
https://github.com/eclipse/iottestware.opcua - Project repository hosted on GitHub.
https://github.com/eclipse/iottestware.dashboard - Project repository hosted on GitHub.
https://github.com/eclipse/iottestware.performance - Project repository hosted on GitHub.