Kubernetes is described as 'open source orchestration system for Docker containers' and is a popular Virtualization Tool in the Network & Admin category. There are more than 25 alternatives to Kubernetes for a variety of platforms, including Linux, Windows, Mac, Self-Hosted solutions and Online / Web-based. The best alternative is Vagrant, which is both free and Open Source. Other great apps like Kubernetes are virt-manager (Free, Open Source), Heroku (Freemium), Rancher (Free Personal, Open Source) and Portainer (Free Personal, Open Source).
Rancher Desktop is an open-source desktop application for Mac, Windows and Linux. It provides Kubernetes and container management. You can choose the version of Kubernetes you want to run. You can build, push, pull, and run container images.
Porter is an alternative to Heroku that runs in your own cloud (AWS, GCP, DigitalOcean, etc). Get started on Porter without the overhead of DevOps and fully customize your infra later when you need to.