BusyCal displays your calendar in Day, Week, Month, Year and List views. What makes BusyCal unique is its ability to customize these views to more precisely meet your needs.
Calendar 366 II is a powerful menu bar calendar that comes with 8 different views and 9 themes to fit your needs and new features such as invitations & attachments.
Fantastical 2 is a robust, intuitive calendar app with a beautiful interface and dozens of features. For instance, a full-fledged mini-calendar that sits in your menu bar for quick access. It works with iCloud, Exchange, Google, Yahoo, fruux, and CalDAV accounts. But… it comes with a $50 price tag.
With InstaCal you can access your calendar from anywhere, simply by clicking the date in the menu bar. Always available in your Mac menu bar, InstaCal is quick and convenient and can be opened at any time. You can also add, view and edit reminders.