Sites and apps similar to Outlook Calendar include Tuta Mail, which is open source with a free version. Other options are Google Calendar, Proton Calendar, Fossify Calendar and Tuta Calendar. There's no shortage of Calendar Apps like Outlook Calendar, with more than 50 alternatives for Android, iPhone, Windows, iPad and Mac.
CalenGoo gives you a fast and easy way to access and change your Google Calendar (or Google Apps Calendar) with your Android device. It can either work with the built-in calendar or it can sync directly with Google.
WebCalendar is a PHP-based calendar application that can be configured as a single-user calendar, a multi-user calendar for groups of users, or as an event calendar viewable by visitors.
United States
Germany
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Unlike other calendar programs, Teamup does not require any user account. No signup, no login. Access to Teamup Calendar is as simple as opening a calendar link in your web browser. The calendar links can be shared with as many users as needed.
Switzerland
Quickly see the time until your next meeting from any of your calendars. Click on the button to be taken to your calendar.
Google Calendar Repair, Editing & Maintenance: Delete Duplicates, multiple edit and delete, search/replace, undo failed import and sync and more!.
Calendarscope is a full-featured calendar software for planning, managing, and scheduling appointments, meetings, birthdays, vacations, special events. It allows you to view all your events in a daily, weekly, monthly, or yearly overview.
Russia
SSuite My Calendar Diary Portable is a software utility whose purpose is to provide individuals with a simple means of keeping better track of their schedule.
South Africa
Experience the ease of use of a weekly calendar in the palm of your hand! Easy Calendar is the new easy way to plan your day. Designed around frequent tasks, Easy Calendar allows anyone to create new events with just a few taps!
A lightning-fast utility to calculate ISO 8601 calendar weeks, reverse-lookup dates, and generate embeddable website widgets.
