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Apps with 'Built-in Calendar' feature

  1. Thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after Mozilla Firefox.
  2. Microsoft Outlook, part of the Microsoft Office Suite (not to be confused with Microsoft Outlook Express), is a personal information manager that lets you manage your e-mail, calendar, contacts, and tasks.


  3. Microsoft To-Do is a simple and intelligent to-do list that makes it easy to plan your day. Whether it's for work, school or home, To-Do will help you increase your productivity and decrease your stress levels.
  4. Microsoft Teams is the chat-based workspace in Office 365 that integrates your team's people, content, and tools to be increase engagement and efficacy.
  5. Web- and IMAP-based email service. 2GB cost 1€/month. Information is hosted on encrypted hard drives. Electricity from renewable resources is used.
  6. 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.
  7. With Buffer all you do is put a few tweets in your Buffer and the app schedules them for you throughout the day.
  8. A simple calendar with optional CalDAV synchronization. You can easily create recurring events and setup reminders, it can also display week numbers.
  9. Bring your workspace together into one unified app. It’s everything your team has been looking for in a productivity and messaging app, but easier, and all with your email. Welcome to the shortest path to done.
  10. Fastmail provides one of the most secure and reliable email environments in the industry. Rock Solid Reliability. More safety.
  11. Start writing your thoughts and memories and have them synced and backed up in the cloud. glimpses use Dropbox syncing capabilities to sync all your entries. It stores your data at Dropbox service. Just authorize with Dropbox and you're ready to go.
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    Woelkli – Secure Cloud Storage in Switzerland.
  12. Hitask is the project planner for getting tasks done. Assign, prioritize, and remind tasks to your team with lists. Check progress of each project on the go and see what your organization is working at.
  13. Planfix is designed for people who need more. More flexibility. More customization. More new capabilities. Planfix a customizable tool you use to build a system for managing your team or company.
  14. SquidHub is a collaboration app for people who want clarity, simplicity, a bit of fun and a great way of working together. Click here to get started!