Please don't use 'XenForo' in your add-on ID without specific prior consultation with XenForo Ltd. We would like to retain this for official use, and the use of it might imply some form of official status that is not the case.
To be honest, I wasn't sure if any of the Plug-ins here were "official".
Forums like vB don't allow plug-ins to be added to their board (or at least that's what I remember many years ago), all of the plug-ins were found on the .org site (with some disclaimer that vB doesn't support issues with the plug-ins etc..)
So... I though, since there is currently no .org site for xenForo (although I noticed you've bought that domain ), I thought that some of the plug-ins here might be developed by xenForo developers and possibly supported by XF