I'm one of the co-founders of Permify. We're building open-source authorizations for better fine-grained systems.

We recently build Rego policy enforcer. It's an open source tool that allows you easily create complex authorization policies. Supports RBAC, ABAC and resource filtering based on them.

You can basically; - Generate your complex authorization policy easily with code. - Export the rego (policy language for defining rules that are evaluated by the OPA engine) you created with the code. - Filter data based on your authorization logic. - Make decisions about multiple resources from one policy. - Get the details of the decisions made. - Add custom messages and handle decision messages.

Looking forward hear your feedback :)