AnCal!

Microsoft Outlook, part of the Microsoft Office Suite (not to be confused with Microsoft Outlook Express), is a personal information manager that lets you manage your e-mail, calendar, contacts, and tasks.

EssentialPIM lets you manage appointments, tasks, notes, contacts, password entries and email messages across multiple devices and cloud applications.

Keep track of your busy schedule and share it with others using Calendar. Create separate calendars — one for home, another for school, a third for work, and so on. See all your calendars in a single window or choose to see only the calendars you want. Calendar lets you create invitations using information from Contacts, update your guest list, keep track of responses, and receive the latest status information. When you or another Mac user receives a Calendar invitation via Mail, it’s automatically added. Calendar also works with iCloud, Yahoo!, and Google. And when you use iCloud, every Calendar edit you make on your Mac automatically appears on your iPad, iPhone, and iPod touch. So no dinner dates are missed, no meeting goes unattended, and no anniversary is forgotten. »

Why?

Windows 10 has Mail and Calendar apps already built in.

An offline calendar without any other calendar integration. You can easily create recurring events and setup reminders, it can also display week numbers.

Android calendar-app showing the weeks of the year (week numbers), 21 languages, syncable with Google Calendar: FEATURES* intuitive navigation with smooth transitions* day, week & month calendar* 48 colors per calendar, per-event color if supported by the calendar (Android Jelly Bean with Google Calendar only)* flexible recurrences (e.g., every 3 weeks)* birthdays & anniversaries with photos from your addressbook and editing* Fullscreen widgets* custom event font size* uses Android's native calendar backend and synchronization* no battery drain* moon phases and zodiac signs for birthdays* QR barcode sharing of events* NFC sharing (if supported by the device) NEW* free* no adsTRANSLATIONSnative language support for English, Arabic, Czech, Danish, Dutch, German, Greek, Spanish, Finnish, French, Hebrew, Italian, Japanese, Korean, Polish, Portuguese, Russian, Slovak, Swedish, Turkish and Chinese with more to come »

Business Calendar for Android is a complete calendar application that synchronises with your Google calendars.

Schedule books must be practical and has a good design. You may look for personal organizer at the stationary shops to meet these qualities. There hasnt been an appointment organizer so practical as to replace with the paper organizers.

CalenGoo gives you a fast and easy way to access and change your Google Calendar (or Google Apps Calendar) with your Android device. It can either work with the built-in calendar or it can sync directly with Google.