Drush command to show installed modules but not being used? In the process of developing a site I inevitably install modules thinking they are the ones I want but they are not. I am looking for drush command to find these modules to disable them and reduce my resource overhead. Can anyone point me in the right direction?

maybe something like [drush resource cleaner];
Drush has no way of knowing if a module might have some hook that is performing an active service for the site, even in the absence of any configuration information, so no, this feature is not available.