MineTime is a free, modern and multi-platform calendar application.
CalReply is a Calendaring platform that enables TV networks and businesses to enable fans and viewers to subscribe to event schedules.
powerful calendar app for macOS
Calendars 5 seamlessly syncs with local iOS calendars, Reminders and even Google Calendar.
Smart Calendar Assistant for Gmail | Boomerang Calendar
Tiny Calendar is a google calendar app designed for Android users to sync google calendars and events between platforms.
VCalendar is an open source Web calendar application for posting and maintaining events and schedules online.
Bunch is a simple web dashboard that integrates with your teams' calendars.
CaLogic is a feature rich, muti-user, open source web calendar.
Customizable web calendars that blend into your site
Time.ly is a collaborative calendar solution for websites.