Apps with 'CalDAV' feature

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eM Client is a full featured email client with a clean and efficient user interface.

Evolution is a personal information management application that provides integrated mail, calendaring, address book and task list functionality.

Tasks is libre open-source software, based on the original source code from the popular Astrid Tasks & To Do List! Tasks is easy-to-use, feature-packed, flexible and customizable, and synchronizes with a variety of services.

There’s big news attached. The best way to manage email on a Mac, according to Apple.

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.

mailbox.org offers a secure e-mail account for home and business use. The domain name, me@mailbox.org, is easy to remember and can be understood anywhere in the world. They have been operating e-mail accounts for more than 20 years and are a highly reliable service provider.

Mailfence is a free secure and private mail service, that provides an end-to-end encrypted email.

DAVx5 is a CalDAV/CardDAV management and sync app for Android.

Fastmail provides one of the most secure and reliable email environments in the industry. Rock Solid Reliability. More safety.

fruux is a free service that takes care of your contacts, calendars and more so you don't have to. Never manually copy contacts and calenders between your devices again!

The mail service which respects you.

Morgen merges your calendars, to-dos, productivity apps, and schedulers, so you manage all your time in one place. With Morgen as your time management hub, you’ll stop wasting time flipping between calendars, apps, and browser tabs, and just get work done.

Fantastical is a flexible calendar with natural language event creation, a beautiful calendar and event list, support for CalDAV (including Google Calendar delegates) automatic alarms, and instant searching.

The Radicale Project is a complete CalDAV (calendar) and CardDAV (contact) server solution.