Openattic 3.x is an open-source frontend for managing and monitoring Ceph, focusing on features like storage management, integration with monitoring tools like Prometheus and Grafana, and enhanced dashboard capabilities. The new version emphasizes simplification, improved error handling, and additional features for better pool and volume management. It allows for streamlined management and monitoring of Ceph systems without storing local information, while also supporting deployment through Deepsea based on SaltStack.