OwnCube is an OwnCloud provider. OwnCube offers a FREE and a Premium Service, where all your photos, videos, documents, music, projects are always available and can be shared with anyone at any time. Not only are your files accessible and easy-to-handle on OwnCube, but you can...


+17
Own your time with Calendars by Readdle across all your Apple devices – Mac, iPhone, iPad, and Apple Watch.


+7
gSyncit™ is a Microsoft Outlook add-in that allows for the synchronization of Outlook calendars, contacts, notes, and tasks with your Google account.
Cost / License
- Paid
- Proprietary
Platforms
- Windows


+2
Free Outlook Plugin, which synchronizes events, tasks and contacts between Outlook and Google, SOGo, Horde or any other CalDAV or CardDAV server. Supported Outlook versions are 2016, 2013, 2010 and 2007.





+4
GMinder is a reminder program that waits in your system tray and alerts you when you have an upcoming Google Calendar event.


+2
End-to-end encrypted sync for calendar, contacts and tasks. Integrates with your existing apps, data is encrypted on your devices before it ever reaches the server.
Cost / License
- Freemium
- Open Source
Application type
Platforms
- Online
- Android
- Windows
- Mac
- Software as a Service (SaaS)
- Self-Hosted
- Docker


+13
Appointments and reminders, meetings and deadlines, birthdays and dates - make the most of your time with Calendar 366 II!


+11
Mulberry is a powerful, easy to use electronic mail (email) and calendar program that allows you to send, access, and manage email and calendars. Mulberry also helps you manage other related information, such as contact information.
Cost / License
- Free
- Open Source
Application types
Alerts
- Discontinued
Platforms
- Mac
- Windows
- Linux

This utility synchronizes Outlook calendar and task list entries to a Google calendar, vice versa, and both ways. Create profiles to sync multiple calendars. Modify sync frequency, direction, and filters. Outlook 2007 to 2016 are supported.
Cost / License
- Free
- Open Source
Platforms
- Windows


Calm Calendar synchronises your events between calendars, while excluding private details. Let your colleagues know that you're busy without revealing why. The result: Fewer meeting conflicts, and better separation between work and life!
Cost / License
- Paid
- Proprietary
Platforms
- Online

MIDAS is a leading room booking system giving you complete control over your room bookings and resource scheduling, and trusted by organizations and businesses of all shapes and sizes around the world.
Cost / License
- Paid
- Proprietary
Application type
Platforms
- Online
- Self-Hosted
- Software as a Service (SaaS)


+13
AkrutoSync automatically and privately syncs Outlook PC contacts, calendar, tasks and notes direct with any Android, Windows phone, iPhone or iPad. Keeps information out of cloud.
Cost / License
- Paid
- Proprietary
Platforms
- Windows
- Android
- iPhone
- Android Tablet
- Windows Phone
- iPad


+3
DAViCal is a server for calendar sharing. It is an implementation of the CalDAV protocol which is designed for storing calendaring resources on a remote shared server. It is a repository for calendar, todo, journal and vcard entries to be accessed via CalDAV clients such as...
Cost / License
- Free
- Open Source
Platforms
- Mac
- Windows
- Linux
- Online
Cost / License
- Free
- Proprietary
Application types
Platforms
- Online
- Software as a Service (SaaS)


+3
Spanning Sync 3 is the one app that syncs both iCal with Google Calendar and Address Book with Google Contacts. It gives you even better control over how your information syncs, and is now up to 10x faster!
Cost / License
- Paid
- Proprietary
Platforms
- Mac


+1
GDPR-compliant two-way calendar sync across Google, Outlook / Microsoft 365, iCloud, CalDAV and German providers like GMX. You choose per sync what is shared: busy only, title and time, or full details. Connects to Claude and ChatGPT via MCP. German company, German servers, DPA available.
Cost / License
- Freemium
- Proprietary
Platforms
- Online
- Software as a Service (SaaS)


+3
Schedule Planner HD is a daily planning aide that helps users to organize their tasks by category and priority. The app features a practical and simple user interface that allows users to either create day plans from scratch or by editing pre-existing plans from external...



OggSync’s mission is to keep mobile users in sync with the scheduling demands of a busy lifestyle, keeping all calendars in one manageable view! Whether it is a users’ Google or Outlook calendar, OggSync syncs to a users mobile phone quickly and automatically, allowing users see...
Cost / License
- Paid
- Proprietary
Platforms
- Windows

Run your Airbnb like a Superhost Automated guest communication, sync calendars, combine multiple accounts in single inbox.
Cost / License
- Freemium
- Proprietary
Platforms
- Online
- Android
- iPhone
- iPad



InviteOnce is an in-the-funnel scheduling solution designed to move prospects faster through the funnel by optimizing scheduling for each meeting scenario.
Cost / License
- Paid
- Proprietary
Application type
Platforms
- Online
- Software as a Service (SaaS)


Trevor AI is a smart task planner designed for streamlined daily planning with AI-driven scheduling, time-blocking, and focus management. It integrates with Google and Microsoft calendars, as well as task managers like Todoist, to centralize tasks in one unified Task Hub.

Bookibles is an online booking platform for service businesses, providing salons, studios, freelancers and consultants a public booking page with services, prices and availability, plus scheduling, automatic reminders, customer messaging and Google Calendar sync.
Cost / License
- Freemium
- Proprietary
Application type
Platforms
- Online
- Software as a Service (SaaS)


+5
CCalendar, formerly Moo Calendar, is a free Windows calendar software supports Google Calendar and Yahoo! calendar. It is featured with multiple calendars support, easy agenda generating and printing, handy TO-DO list and integrated weather forecast.
Cost / License
- Free Personal
- Proprietary
Application type
Alerts
- Discontinued
Platforms
- Windows


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