You don't have to make one of these!
Sort into category or not. Alphabetise if that helps you. Some useful headings might be Character, World, Language, Species, Artifact. Avoid listing something twice except when really merited.
If you make sure the pages for all your creations are linked to your author page, then keeping tabs on your list becomes a matter of checking your [backlinks].
This page is evidently an exception to the 'no subpages' rule - it is the only exception to date, though.