Plugings Question

[Legolas]

I'm new to the forum and I hope I'm posting my questions in the right place.

I set up Roundcube on my web space because my provider only provides a very old version of Roundcube. Now I would be interested to know which are good and useful plugins. I would like a calendar that can be addressed via CalDAV.

With the Roundcube plugins there are several calendars and then there is also Roundcube+

Can you recommend me one?

Thanks
SW