synchronize calendars and contacts
Vdirsyncer synchronizes your calendars and addressbooks between two storages. The most popular purpose is to synchronize a CalDAV/CardDAV server with a local folder or file. The local data can then be accessed via a variety of programs, none of which have to know or worry about syncing to a server.
Homepage: https://vdirsyncer.pimutils.org/
Maintainer: Remi Locherer <remi@openbsd.org>