Have you plenty to do and never forget anything? Then you are a lucky person. For those of us who are not that perfect KOrganizer provides a To-Do list which helps to organize the things you have to do.
You can assign priorities, set due dates, invite attendees, define categories of to-do's, arrange tasks that depend on each other in hierarchical lists and more. Once completed, you check and remove the To-Dos with a single click of the mouse.