kube-iptables-tailer is a service that gives you better visibility on networking issues in your Kubernetes cluster by detecting the traffic denied by iptables and surfacing corresponding information to the affected Pods via Kubernetes events.

Sloop monitors Kubernetes, recording histories of events and resource state changes and providing visualizations to aid in debugging past events.

Debugging tool for Kubernetes which tests and displays connectivity between nodes in the cluster.

Sysbox is an open-source container runtime (aka runc), originally developed by Nestybox, that enables Docker containers to act as virtual servers capable of running software such as Systemd, Docker, and Kubernetes in them, easily and with proper isolation. This allows you to use containers in new ways, and provides a faster, more efficient, and more portable alternative to virtual machines in many scenarios.

Copper is a simple tool for validate your configuration files. This is specifically useful with Kubernetes configuration files to enforce best practices, apply policies and compliance requirements.