Kalendar Alternatives

Organize your life — it’s about time!

Spend less time managing your day & more time enjoying it

Optimize your schedule with custom booking pages and calendar integrations

Try for free freemium $29.0 / One-off ($29 one-time paymnet)

A simple calendar with events (optional recurring and reminders), week numbers and a customizable...

Open Source

Calendar is a personal calendar app made by Apple Inc. that runs on both the macOS desktop operating system and the iOS mobile operating system.

Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.

Rainlendar - Customizable desktop calendar

Material design open source calendar for Android.

All-in-one Calendar, Tasks & Scheduler. Morgen is the single hub for everything that revolves around time management.

Fantastical, the Mac calendar app you'll enjoy using. Quickly create new events with natural language input and more.

Itsycal for Mac. Itsycal is a tiny menu bar calendar. If you want, it will display your events as a companion to the Mac Calendar app. You can also create and delete (but not edit) events. Download Itsycal for macOS 10.

Calendar Lock PEA is an encrypted desktop calendar with a day, week and month view. The shown calendars are never stored unencrypted on your disk, but exist only in the RAM. Platform-independent, Open Source, no installation or registration required.

Open Source

Sioyek is a PDF viewer designed for reading research papers and technical books.

Open Source

Kontact is the integrated Personal Information Manager of KDE.