GMX Calendar is described as 'Your free online calendar' and is a Calendar App in the Office & Productivity category. There are more than 100 alternatives to GMX Calendar, not only websites but also apps for a variety of platforms, including Windows, Android, Linux and iPhone. The best alternative is Google Calendar, which is free. Other great sites and apps similar to GMX Calendar are Etar (Free, Open Source), Lightning Calendar (Free, Open Source), Simple Calendar (Freemium, Open Source) and Rainlendar (Freemium).
With Google Calendar, its easy to keep track of all your lifes important events in one place. You can add events and send invitations effortlessly, share your schedule with friends and family, and search for events you might enjoy.
Why? I wanted a simple, material design, state of the art open source calendar that anyone can improve on. Features: - Month view. - Week, day & agenda view. - Uses Android calendar sync. Works with Google Calendar, Exchange, Etesync etc.
Organize your schedule and life’s important events in a calendar that’s fully integrated with your Thunderbird or Seamonkey email. Manage multiple calendars, create your daily to do list, invite friends to events, and subscribe to public calendars.
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 run it on all major operating systems: Windows, Linux and Mac OS X.
Morgen is a modern and multi-platform calendar application. It connects to several calendar providers (including Google Calendar, Microsoft Exchange, Outlook.com, iCloud) and provide advanced scheduling features powered by Artificial Intelligence.
Kontact is the integrated Personal Information Manager of KDE. Kontact suite unites mature and proven KDE PIM applications under one roof. Thanks to the powerful KPart technology, existing applications are seamlessly integrated into one.