Kamal
https://github.com/basecamp/kamal
Kamal offers zero-downtime deploys, rolling restarts, asset bridging, remote builds, accessory service management, and everything else you need to deploy and manage your web app in production with Docker. Originally built for Rails apps, Kamal will work with any type of web app that can be containerized.
uncloud
https://github.com/psviderski/uncloud
Take your Docker Compose apps to production with zero-downtime deployments, automatic HTTPS, and cross-machine scaling. No Kubernetes required.
Nomad
https://github.com/hashicorp/nomad
Nomad is a simple and flexible workload orchestrator to deploy and manage containers (docker, podman), non-containerized applications (executable, Java), and virtual machines (qemu) across on-prem and clouds at scale.
Note: Business Source License, Change Date is Four years from the date the Licensed Work is published.