Chiri
Cross-platform CalDAV task management app
...It uses the CalDAV protocol to connect with compatible servers, including Nextcloud, Fastmail, Radicale, and Baikal. Users can create tasks, organize subtasks, and rearrange items through drag-and-drop controls. The software supports recurring tasks for managing activities that repeat on a schedule. OAuth authentication is available for compatible CalDAV providers. It also supports WebDAV Push notifications for near-instant synchronization when supported by the server. Built with Tauri, Chiri is available for Windows, macOS, and Linux, providing a desktop solution for managing tasks through open synchronization standards.