RunaWFE Free
is low code bpm platform, which is easy to install and easy to use
...Administrators can: create /remove actors and groups, include /exclude actors to/from groups, grant permissions on system objects to actors and groups, forcibly stop business process instances, add/change actors substitutions rules.
Tutorial: https://runawfe.org/doc/Tutorial
InstallationGuide: https://runawfe.org/doc/InstallationGuide
Documentation: https://runawfe.org/doc/Documentation