I've use Helm before, but I see some projects now are supporting a new plugin manager called Krew. Specifically, minio, provides a Krew package.
What is the difference between Krew and Helm? How do they compare?
They do different things,
kubectl
the client-side cli tools for Kubernetes. For example, minio uses Krew becuase it provides kubectl minio
which is the MinIO Kubernetes plugin.