Just trying to check and make sure I never missed any. Is it just writefreely and plume right now?
Well, for various reasons I stopped hosting my own Hubzilla instance some years ago, but back then it absolutely had CalDAV and CardDAV. The problem was mainly that this wasn’t well exposed in the Hubzilla web-interface, other than an event calendar. But with Thunderbird and DAVx5 etc. you could connect to it and manage it just fine. The WebDAV file storage part worked fine in the web-interface as well.
Edit: these parts are not federated though AFAIK (contrary to Nextcloud which does have some kind of file-sharing federation).
Sure - Hubzilla has file-sharing functionality… but the files stay on your could…
The magic and real power of Hubzilla however is that you can share permission and access rights across Fedi Servers…
so even the files stay on your server you can “federate” access all over the Fediverse … you can´t do that with Nextcloud
With Nextcloud you can share with an Email account holder - with Hubzilla you can share with an Fedi account holder
It’s true that Hubzilla has access permissions for files on your WebDAV folder, and those access permissions sort of federate to other Zot protocol using sites (but not the wider Fediverse), but Nextcloud also has its own inter-Nextcloud federation where you can access files on other Nextcloud instances right inside your Nextcloud.
those access permissions sort of federate to other Zot protocol using sites (but not the wider Fediverse),
there were improvements done in the last years… so with the OCAP function ( /settings/privacy ) and guest tokens ( /tokens ) we can share permissions for files across the Fediverse … and even to people who do not have a Fedi Account jet
come back on board and have a closer look