caldav

stalwart

+282

All-in-one Mail & Collaboration server. Secure, scalable and fluent in every protocol (IMAP, JMAP, SMTP, CalDAV, CardDAV, WebDAV).

flectar/mail

+126

Built from the ground up for speed. Flectar Mail delivers native performance, instant startup, and as little as 80 MB of RAM.

Kozea/Radicale

+25

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

planify

+16

Task manager with Todoist, Nextcloud & CalDAV support designed for GNOME

keeper.sh

+14

Calendar sync tool & universal calendar MCP server. Aggregate, sync and control calendars on Google, Outlook, Office 365, iCloud, CalDAV or ICS.

pbek/QOwnNotes

+12

QOwnNotes is a plain-text file notepad and todo-list manager with Markdown support and Nextcloud / ownCloud integration.

davx5-ose

+9

DAVx⁵ is an open-source CalDAV/CardDAV suite and sync app for Android. You can also access your online files (WebDAV) with it.

docker-radicale

+6

Docker image for Radicale calendar and contact server :calendar: + security :closed_lock_with_key: + addons :rocket:

mailez

+6

Self-hosted mail server for your own domain: SMTP/IMAP/POP3, CardDAV/CalDAV, React webmail and admin console, one-command Docker Compose.