Fossify Calendar is described as 'Your privacy-aware, open-source calendar with intuitive design and multi-platform syncing' and is a popular Calendar app in the office & productivity category. There are more than 50 alternatives to Fossify Calendar for a variety of platforms, including Android, Windows, Linux, Web-based and iPhone apps. The best Fossify Calendar alternative is Google Calendar. It's not free, so if you're looking for a free alternative, you could try Google Calendar or Etar. Other great apps like Fossify Calendar are Simple Calendar, Nextcloud Calendar, Apple Calendar and Morgen.
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 similar to that of other PIMs, such as Microsoft Outlook, Mozilla Calendar, Palm Desktop, Yahoo Calendar, etc...
United States
Android calendar-app showing the weeks of the year (week numbers), 21 languages, syncable with Google Calendar:
Germany
EU
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 calendar by week or month. Cozi is the easiest online calendar you'll ever use.
United States
Zoho Calendar is an online calendar that helps you stay organised. Zoho Calendar makes scheduling events & appointments, sharing team calendar, booking resources easy & effortless. With over 15 million happy users, we are equipped to cater for different needs - Personal...
India
This program helps you organizing your dates and tasks and reminds you of upcoming events.
GermanyEU
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 calendar that sits right on your Windows desktop.
United States
lightweight, client-only calendar web application. All data persists in the URL hash for instant sharing, No backend required. Optional AES-GCM password protection keeps shared links locked without a server.
Sri Lanka
newDay is an experimental timekeeping and calendar system that helps users to set intentions for each of the ten newHours that comprise a newDay.
Indonesia
Business Calendar for Android is a complete calendar application that synchronises with your Google calendars.
GermanyEU
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 upon clock click, but of course it will work without it.
Russia
Osmo is a handy personal organizer, which includes calendar, tasks manager, address book and notes modules. It was designed to be a small, easy to use and good looking PIM tool to help to manage personal information.
