Peek Calendar!

Fantastical is a flexible calendar with natural language event creation, a beautiful calendar and event list, support for CalDAV (including Google Calendar delegates) automatic alarms, and instant searching.

Itsycal is a tiny calendar for your Mac menu bar. If you want, it will display your appointments and serve as a companion to the Mac Calendar app.

Day-O is a simple menu bar clock replacement with a simple calendar for your Mac. Which uses strftime style customisation.

Calendar 366 is the perfect menu bar mate for OS X's Calendar app. Click on the icon and get an overview of your events. Click on a date and see details, or switch to the expanded view* to see all upcoming events in just a single window.

Calendars 5 seamlessly syncs with local iOS calendars, Reminders and even Google Calendar.Now all your events and tasks are in a single application, which is always on hand.

qOrganizer is a general organizer that includes a calendar with schedule,reminders,journal/notes for every day, to-do list.But provides features useful for students such as:timetable and a booklet for marks and absences.It's designed to be easy to use.

Put a calendar on your menu bar, and access your calendar, weather, and more at a glance.