Google Calendar - Spend less time managing your day & more time enjoying it
Plan - Plan is a better way to organize.
Teamup Calendar - Cloud-based calendaring using capability URL, application developed in Zurich, Switzerland.
Kin Calendar - The simple and connected calendar
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
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.