Baïkal is a Calendar+Contacts server
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Updated
Aug 13, 2026 - PHP
Baïkal is a Calendar+Contacts server
☁️ Nextcloud server, a safe home for all your data
Scheduling infrastructure for absolutely everyone.
A simple CalDAV (calendar) and CardDAV (contact) server.
Calendar sync tool & universal calendar MCP server. Aggregate, sync and control calendars on Google, Outlook, Office 365, iCloud, CalDAV or ICS.
Timeful (formerly Schej) is a scheduling platform helps you find the best time for a group to meet. It is a free availability poll that is easy to use and integrates with your calendar.
Rallly is an open-source scheduling and collaboration tool designed to make organizing events and meetings easier.
Self-hosted JMAP webmail for Stalwart Mail Server. Mail, calendar, contacts, and files in one client.
To associate your repository with the cat-calendar topic, visit your repo's landing page and select "manage topics."