ActiveTreeNotes is a blazingly fast, very simple to use information organizer. Using a hierarchical metaphor (tree based), you can create and organize any kind of information, from websites, to ski resorts, to recipes, to writing snippets. The tree holds information in a hierarchy, with each folder being tied to a entry on the right. The entry has bold/italics/underline, plus other commonly used word processing capabilities.

EfficientPIM
EfficientPIM is a professional All-In-One personal information manager. It can manage your contacts, appointments, tasks, diaries, notes and passwords or any other information that makes working with it quicker and easier.

C-Organizer
C-Organizer is a personal information manager with elegant design and all the necessary features: it lets you plan your day, set alarms and keep and address book with photos. Also this program includes a password manager and notebook.

AddressBook für Windows
Its well-designed screens and extremly high user freindliness enable you to get up and running without a lot of learning

Info Angel
Info Angel is a personal information manager (PIM) comprising a Notebook, a Contact Book, an Organizer and a Bookmark Manager.

TaskPrompt
Complete all your daily and scheduled tasks on time. TaskPrompt is a task reminder utility. You can add tasks and categorize them. Set the task's occurrence to Immediate, Todo, Minutes, Hourly, Hours, Daily, Days, Weekly, Weeks, Monthly, etc.