Aren’t those just Airwalks?
Aren’t those just Airwalks?
Ok, so this is a ”how many colors of the rainbow there are”
If you go balls to the wall, all out retardation: Nextcloud, the CalDAV is basically just a bonus, I’ve replaced google.com at home with Nextcloud
Some middle ground: SoGo, sogo.nu
If you just want to solve this specific problem: Radicale, https://radicale.org and Baikal, https://sabre.io/baikal/
I daily sway, I’ve got some issues but they aren’t that bad.
Edit: And not to toot my own horn, I’ve had sex at least twice… 😂