D20 Modern Campaign Settings
From D&D Wiki
This is a list of campaigns that use the D20 Modern rules, rated in order of completeness.
See Campaign Seeds for short-form, systemless, campaign ideas.
This is very comprehensive in most aspects.
This is complete in many aspects, but information is sparse in a few categories.
This has some, but often sparse, information in most categories.
This has some sparse information, but large amounts of material are missing.
This is a very minimal page, and is most likely a Stub.