Alternatives to Desktop iCalendar for all platforms with any license

Microsoft Office Outlook

Part of the Microsoft Office Suite, Outlook is a personal information manager that lets you manage your e-mail, calendar, contacts, and tasks.

Commercial $ $ $ Mac Windows Web Android iPhone ... Android Tablet Windows Phone iPad Apple Watch Android Wear
Address book integration Built-in Calendar Calendar Calendar integration ... Custom rules Exchange Native application Onenote Desktop Integration Box.com integration Contacts Dropbox integration Email scheduling Exchange Integration Flight Status Gmail integration ICloud Integration Integrated Search Multiple Account support Night mode/Dark Theme Office 365 integration Onedrive integration Organize mails Shared calendars Signature with image Smart attachments Todos Unified inbox Yahoo Integration Add a feature

363 Like
Lightning Calendar

Organize your schedule and events in a calendar fully integrated with Thunderbird or Seamonkey email. .

Free Open Source Mac Windows Linux Thunderbird SeaMonkey
CardDAV CalDAV Calendar Task Management Add a feature

174 Like
Rainlendar

Rainlendar is a feature rich calendar application that is easy to use and doesn't take much space on your desktop. The application is platform independent so you can...

Freemium Mac Windows Linux
Calendar Customizable Sync with Fantastical Apps that Sync with Google Calendar ... Multiple languages Syncs with various services Add a feature

107 Like
VueMinder Calendar

Take control of your schedule and get reminded wherever and however you want. Instantly access your appointments, tasks, and notes with a simple glance at a transparent...

Freemium Windows
Calendar Events Apps that Sync with Google Calendar Portable ... Reminders Synchronization Add a feature

18 Like
Calendar Lock PEA

Password Encrypted Calendar: Calendar Lock PEA - Displays iCalendars that are plaintext only in RAM, but otherwise always encrypted on the device. - Uses autheticated...

Free Open Source Mac Windows Linux
Encryption Privacy Protected Privacy focused Authenticated encryption ... Calendar Encrypted Notes Privacy-friendly Add a feature

8 Like
UKs Kalender

This program helps you organizing your dates and tasks and reminds you of upcoming events.

Free Windows
Calendar Planner Add a feature

12 Like
KDE Plasma Workspaces

Plasma Workspaces is the umbrella term for all graphical environments provided by KDE. Plasma separates components into "data engines" and their visualization...
- Discontinued
  The term "KDE Plasma Workspaces" is no longer in use anywhere with the release of KDE Plasma 5 in 2014. It has been broken up into multiple components; the important ones are already in the AlternativeTo database (e.g. KDE Plasma).
Free Open Source Linux
Widgets Add a feature

10 Like
BORG Calendar

BORG is a combination calendar and task tracking system. The calendar supports all sorts of appointments and also a simple todo list. The calendar functionality is...

Free Open Source Windows Linux
Calendar Task tracking Todos Add a feature

8 Like
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Cozi

Cozi is a free online calendar that helps families coordinate activities. See who needs to be where and when, be reminded of upcoming appointments, and print your...

Free Web Android iPhone Blackberry Android Tablet ... Windows Phone iPad Kindle Fire
Family Calendar Desktop app Grocery list To-Do management ... Todos Add a feature

9 Like
gsimplecal

gsimplecal is a lightweight calendar application written in C++ using GTK2. It was intentionally made for use with tint2 panel in the openbox environment to be launched...

Free Open Source Linux
Calendar Does one thing and does it well Gtk Add a feature

3 Like