Aqua has been releasing some really great k8s security tools recently.

kube-bench [1] and kube-hunter [2] are worth a look as well.

[1] https://github.com/aquasecurity/kube-bench [2] https://github.com/aquasecurity/kube-hunter

2 of starboard's capabilities are to run kube-bench and kube-hunter, and yeah, aqua has been doing some great work for the community in this space.