From Prana Computing:
Schedule and track appointments and to-do items through the familiar spreadsheet interface. You can schedule repeat tasks and appointments in a single step, set pop-up appointment reminders, and look at your schedule and task list in monthly, weekly, or user-specified-duration views. Adjust your view size with a handy slide bar to enlarge or shrink the onscreen information. Ensure the safety of your data with built-in backup and restore functions. Version 1.3 adds the option to display the time in a 24-hour format, and it adds minor bug fixes.