The Operator concept skyrockets in the entire Kubernetes ecosystem. Based on the overview of most popular controllers I’ve distinguished the toolkits that help you to build an operator.
The Kubernetes Operator remains a hot topic in 2020 and 2021 because it helps managing applications at scale. Check my previous article, if you want to know more about How works Kubernetes Operators.
The link below presents accurate list of all frameworks with the short description ordered alphabetically.
If you find out missing Framework, add it here by creating a PR on GitHub.