EssentialPIM Pro is the advanced version of Personal Information Manager that will handle all your calendar, contact, to do and notes needs in an easy- to- use, manageable form. It is a shareware organizing application that's professional, light on system resources, comprehensive, well-designed and reliable.
Here are some screenshots to illustrate the features and user interface of this application:
CherryTree for Windows
Simple Sticky Notes
Efficient Lady's Organizer Free
EssentialPIM
EssentialPIM Portable