Castle Windsor vs Kopf: What are the differences?

What is Castle Windsor? A mature Inversion of Control container for .NET. It can give you objects with pre-built and pre-wired dependencies right in there. An entire object graph created via reflection and configuration rather than the "new" operator.

What is Kopf? A Python framework to write Kubernetes operators in just a few lines of code. It is a framework and a library to make Kubernetes operators development easier, just in a few lines of Python code The main goal is to bring the Domain-Driven Design to the infrastructure level, with Kubernetes being an orchestrator/database of the domain objects (custom resources), and the operators containing the domain logic (with no or minimal infrastructure logic)..

Castle Windsor and Kopf can be primarily classified as "Container" tools.

Kopf is an open source tool with 154 GitHub stars and 7 GitHub forks. Here's a link to Kopf's open source repository on GitHub.