CRI-O
Open Container Initiative-based implementation of Kubernetes Container
...This also applies to features that are independent of Kubernetes. Nevertheless, feature backports to supported release branches, which are independent from Kubernetes or other tools like cri-tools, are still possible. This allows CRI-O to decouple from the Kubernetes release cycle and have enough flexibility when it comes to implementing new features. Every feature to be backported will be a case-by-case decision of the community.