Kozea / Radicale

A simple CalDAV (calendar) and CardDAV (contact) server.

pimutils / khal

:calendar: CLI calendar application

collective / icalendar

icalendar parser library for Python

promaaa / sync-calendar-omarchy

Chronica: calendar & clock for the Omarchy bar. Two-way sync with Google, CalDAV (iCloud, Nextcloud) and JMAP (Fastmail); read-only .ics feeds (Proton, Outlook); reminders, meeting join, offline calendar.