SmartDay - Integrated organizer with automatic scheduling.
Google Calendar - Spend less time managing your day & more time enjoying it
Pocket Informant - Pocket Informant is the Best Calendar app for mac and iOS. Pocket Informant for iOS, Mac desktop, and Android.
CalenGoo - Features | 1.0.175 for Android™
Morgen.so - All-in-one Calendar, Tasks & Scheduler. Morgen is the single hub for everything that revolves around time management.
Jorte - Schedule books must be practical and has a good design.