California is described as 'calendar built for GNOME 3. It allows you to view and manage your online calendars with a simple and modern interface' and is an app in the Office & Productivity category. There are more than 10 alternatives to California for a variety of platforms, including Windows, Linux, Online / Web-based, Mac and Android Tablet. The best alternative is Google Calendar, which is free. Other great apps like California are Lightning Calendar (Free, Open Source), Simple Calendar (Freemium, Open Source), Apple Calendar (Free) and Morgen (previously MineTime) (Paid).
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.
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.
Keep track of your busy schedule and share it with others using Calendar. Create separate calendars — one for home, another for school, a third for work, and so on. See all your calendars in a single window or choose to see only the calendars you want.
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.
GNOME Calendar is a simple and beautiful calendar application designed to perfectly fit the GNOME desktop. By reusing the components which the GNOME desktop is build on, Calendar nicely integrates with the GNOME ecosystem.
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.
Password Encrypted Calendar: Calendar Lock PEA - Displays iCalendars that are plaintext only in RAM, but otherwise always encrypted on the device. - Uses autheticated encryption and a memory-hard key derivation function for the password.