QuickProject is an outline form (hierarchical) things-to-do list. You can define projects. Projects can be divided into tasks. Tasks can be divided into subtasks. You can record the percentage completion at the project level, and at any task or subtask level. You can attach lengthy notes to each individual task or subtask. Responsibility can be assigned to an individual. Individuals can be selected from your Apple Address Book.
Mac OS X 10.3 or later