Calendar is a personal calendar application made by Apple Inc. that runs on both the macOS desktop operating system and iOS mobile operating system.

Omnipointment helps students find time for group meetings and helps teachers understand how their student teams are working together.

Webix UI is a JavaScript Library for cross-platform app development with HTML5 JavaScript widgets.

Doodle radically simplifies the process of scheduling events, meetings, appointments, etc.

Bizimply provides scheduling and attendance without the paperwork.

Planday is an employee scheduling software.