I am currently on a project where I have been asked to clean up the Site Template gallery from various collections across the organization. One of the offending web apps has one site collection where sties and/or subsites are created for collaboration. The goal is to removed unused .stp files. We do not deploy templates through solutions :( My questions as follows: 1.) Is there a way to see a complete inventory of sites and the template it uses without much code. Would love to do this from the UI. This can give an idea of sites we can safely delete. 2.) I am under assumption that we can delete the stp as required and current sites based off the deleted template will still be intact? I just don't want current sites to be impacted. 3.) Lastly,
Outside as deploying templates as wsp solutions are there any other critical best practices in creating templates. Ideally we don't want owners to keep cluttering up the template gallery with crap.