Apache Guacamole (Clientless remote desktop gateway)

Supporting standard remote protocols like VNC, RDP, and SSH.
https://guacamole.apache.org/ Apache Guacamole

Google’s Dig webapp (DNS lookup)

Tool for interrogating DNS name servers.
https://toolbox.googleapps.com/apps/dig/ Google Dig

Obsidian

Flexible writing application using markdown, a non-propietary language.
https://obsidian.md/ Obsidian

Kompose

Docker compose to Kubernetes/Openshift conversion tool.
https://kompose.io/

$ kompose convert -f compose.yaml

$ kubectl apply -f .

$ kubectl get pods
NAME                            READY     STATUS              RESTARTS   AGE
frontend-591253677-5t038        1/1       Running             0          10s
redis-leader-2410703502-9hshf   1/1       Running             0          10s
redis-replica-4049176185-hr1lr  1/1       Running             0          10s

While you can get away without a version tag in your compose.yml file for modern docker ce, you will get a complaint from this tool unless you put in a version: tag