Google Calendar - Spend less time managing your day & more time enjoying it
UpNote - A beautiful and clean cross-platform app for notes organizer
Jorte - Schedule books must be practical and has a good design.
Notesnook - Notesnook is a simple and private note taking app that keeps your notes organized and synced on your phone, tablet and computer.
Business Calendar - Powerful and easy to use calendar app for Android including weather, widgets and tasks.
Note Board - Productivity app. Save information like a sticky notes.