Overnode is described as 'multi-host container orchestration tool with a focus on simplicity and predictability'. There are nine alternatives to Overnode for a variety of platforms, including Linux, Windows, Mac, Online / Web-based and Self-Hosted solutions. The best alternative is Kubernetes, which is both free and Open Source. Other great apps like Overnode are OpenShift (Freemium, Open Source), Portainer (Free, Open Source), Rancher (Free, Open Source) and Docker Swarm (Free).
Rancher is an open source project that provides a complete platform for operating Docker in production. It provides infrastructure services such as multi-host networking, global and local load balancing, and volume snapshots.