Total Organizer is a free personal organizer, that lets you store contacts, addresses, notes or personal information, task lists etc.
The principle characteristic of Total Organizer is that it organizes all the information into folders/categories like a family tree. An object (a contact, note, task ...) can be in more than one category. This is known as "tags". These tags are also organized into a tree. Also, if you are viewing a certain category, you can also see all sub-folders in that category.