Canal is an open-source project primarily used for integrating network connectivity between different Docker containers and Kubernetes. It combines elements from both the Flannel and Calico networking projects to provide a comprehensive networking solution that supports network policy enforcement. Canal leverages Flannel's simple networking model for overlay networks and combines it with Calico's robust policy enforcement features to allow users to manage network policies efficiently in cloud-native environments. The project is hosted on GitHub, where users can access its source code, contribute to its development, and find detailed documentation on deployment and usage.