In the past I have used various plugins and they are not available here anymore. Is this because they won't work with the current version ? In particular at this time I am looking for the Community Builder plugin because it would be very useful for a site i am working on right now.
(https://explorejoomla.com/extension/community-builder-for-advanced-link.html)

Hi,
as I see that plugin was commercial and was done by a different developer, so if you would pay maybe somebody can do this for you.

ok, I would be interested in a quote from somebody who wants to work on this.