Kubernetes GUI

There's various GUI for Kubernetes that I've found:
For now my recommendation would be Kontenta-Lens, you'll get a bird-view of your cluster.
For shell autocomplete, I recommend kube-prompt (or other shell-specific autocomplete)

If you only need docker GUI, you can try Dry
If you prefer web-based GUI, you can try Portainer (it could manage much more than just kubernetes, but also local docker and docker swarm), it's quite better than Rancher.