We would like to watch if some change happens in ConfigMap and/or Secret; then perform a rolling upgrade on relevant DeploymentConfig, Deployment, Daemonset and Statefulset

https://github.com/stakater/Reloader

pretty K8S UI
https://github.com/benc-uk/kubeview

Really good UI for Cillium, I think that it should help to newbies to understand Cillium by graphical interface
https://github.com/cilium/hubble-ui

An operator for synthetic monitoring on Kubernetes. Write your own tests in your own container and Kuberhealthy will manage everything else. Automatically creates and sends metrics to Prometheus and InfluxDB. Included simple JSON status page. Supplements other solutions like Prometheus very nicely!

https://github.com/Comcast/kuberhealthy

I suggest to try it in case if you're working with Limits/Requests in K8S

Goldilocks is a utility that can help you identify a starting point for resource requests and limits.
https://github.com/FairwindsOps/goldilocks