self hosted

Radicale v3 Documentation (radicale.org)

https://radicale.org/v3.html

Radicale is an alternative to Baikal that is written in Python rather than PHP.

calendar, self hosted server,

Raspberry Pi - Mythic Beasts (mythic-beasts.com)

https://www.mythic-beasts.com/order/rpi/

raspberry pi self hosted

The open-source, self-hostable to-do app | Vikunja (vikunja.io)

https://vikunja.io/

open source self hosted useful