Flocker vs k3s: What are the differences?
Flocker: Run your databases in Docker and make them as portable as the rest of your app. Flocker is a data volume manager and multi-host Docker cluster management tool. With it you can control your data using the same tools you use for your stateless applications. This means that you can run your databases, queues and key-value stores in Docker and move them around as easily as the rest of your app; k3s: Lightweight Kubernetes. 5 less than k8s (by Rancher Labs). Certified Kubernetes distribution designed for production workloads in unattended, resource-constrained, remote locations or inside IoT appliances. Supports something as small as a Raspberry Pi or as large as an AWS a1.4xlarge 32GiB server.
Flocker and k3s belong to "Container Tools" category of the tech stack.
Flocker and k3s are both open source tools. It seems that k3s with 7.81K GitHub stars and 483 forks on GitHub has more adoption than Flocker with 3.19K GitHub stars and 287 GitHub forks.