WAVE Calendar

WAVE Calendar is a free calendar app with a beautiful UI and a smooth navigation. The app includes free tasks and additional calendars to enrich your calendar. To make your calendar experience even better you can download three widgets, add the local weather, add attachments, and add special tags to appointments. Besides this, the app includes all the standard features you would expect from a calendar app!

JUNE - Planner & Calendar

Create appointments, to-do lists, and events in one app. JUNE is the daily planner app that combines the best parts of calendars and task list apps with a colorful drag and drop experience.
Switch between your calendar and to-do lists anytime. Everything just works.

Drag & drop plans between Calendar, To-Do and Memo notes. Plan however you want. 

Business Calendar 2

Business Calendar 2 is very good calendar app.
Feature Overview:
▪ event planner and task management
▪ month, week and day view
▪ agenda with live search
▪ year view
▪ synchronization with Google Calendar and Exchange
▪ support for local calendars and tasks
▪ holidays calendar
▪ birthdays of your contacts
▪ advanced event reminders

Additional Pro Features:easily move and copy events using drag&drop in multi-day view