Microsoft Outlook Calendar - Calendar is a time-management web application by Microsoft.

Plan - Plan is a better way to organize.

Calendar by Designs.ai - A complete calendar of all social media holidays.

Kin Calendar - The simple and connected calendar

Google Calendar - Spend less time managing your day & more time enjoying it

Kin - Kin is money for the digital world. It is used to generate value through a shared, decentralized cryptocurrency in a digital ecosystem of apps and their users.