
Kontact
Google Calendar
Rainlendar
Google Contacts
Apple Calendar
fruux
Simple Calendar
Microsoft Outlook
Getwebstack
MarsX
Getwebstack is for development teams that implement a lot of different projects. It can help outsourcing companies, accelerators, freelancers, or dev studios to develop fast. It is also for individuals that want to test a technology or an idea for a startup with a quick setup and deployment. Getwebstack provides a complete solution that covers all the technical aspects of a web app. It has an affordable monthly subscription instead of an expensive one-time payment.
Kontact
GetwebstackGoogle Calendar - Spend less time managing your day & more time enjoying it
MarsX - MarsX leverages the power of AI to help users build mobile and web applications using code and no-code technology. MarsX is highly accessible, allowing even non-developers and those with zero building and coding experience to create their own mobile
Rainlendar - Rainlendar - Customizable desktop calendar
Google Contacts - Google Contacts is Google's contact management tool that is available in its free email service Gmail, as a standalone service, and as a part of Google's business-oriented suite of web apps Google Apps.
Apple Calendar - Calendar is a personal calendar app made by Apple Inc. that runs on both the macOS desktop operating system and the iOS mobile operating system.
fruux - Free service that takes care of your contacts, calendars and more so you don't have to.