v2.81 Rock generator Where would the Rock Generator be in the official 2.81 release?

It used to be in the Testing category in v2.81 alpha/beta (blender-2.81-c25a910e4ec0-windows64 anyway)

There's nothing in the testing category now.

So where have all those items gone? it's not all moved, just gone.

The only difference is this is the installation rather than standalone zip archive.
The answer below is obsolete since the Rock Generator is now part of Extra Objects add-on since commit rBA7347930a0fa14e752929e28c9b48adf74597b018. The separate Rock Generator add-on has been removed from the add-ons contrib repository by commit rBAC70b649775eeeebedb02c1c7b7aa996a7f6294177.



The release versions only contain the official add-ons. Anything that is from the Blender Add-ons Contrib repository isn't included.

You can either clone the repository if you're familiar with git or you can download a .tar.gz archive of the latest commit of the contribution add-ons using the following link. Extract and copy the files into ./2.81/scripts/addons_contrib/ and you should be able to activate them.