CozyCal - Online appointment scheduling
Digitevent - The powerful software to manage your event participants.
FreeBu - Smart free/busy calendar sharing and meeting organizer.
A2Z Events - A2Z Events is a cloud-based event management solution that allows enterprises to create, manage and collaborate on events.
FullCalendar - FullCalendar is an open-source JavaScript event calendar.
Grenadine Event Planner - All-in-one event management software. All your needs in one place: event planning and scheduling, event website, registration, event mobile app, and APIs.