OnTime
OnTime offers categories to manage events and tasks, a color coded task list, event recurrence support, native translations, multiple views, integration with the online calendar, iZeit and more! OnTime enables you to manage events which can then be viewed by anyone over the internet, enabling easy collaboration and communal calendars and todo-lists. You don't have to make your whole schedule public though, events can be made visible to just you or to everyone. A MySQL or SQLite database provides an efficient way to store events, and OnTime is fully localizable, with native translations into Simplified Chinese, Czech, Portuguese, Spanish, Italian, German, Swedish, Russian, Greek, French and Polish. Drag and drop is fully supported throughout, and context menus providie quick, intuitive access to all features. The developers are always looking for suggestions, so if you have a feature request, post on the forums and let us know!