But let's say there is no app you like. Why not write it or get on some crowd sourcing system and make it?
Bob
I'm really looking for an application, without writing one, to manage folders and files. so I can view my video data by year, genre, actore, .. so on with out utilizing a program layer. I can turn on these viewing feature and sort by them but not edit them. I use other tag editors for audio file but nothing for general file data editing.
I have tried application that are ridiculously complex and not worth installing. Just a simple tool must be out there.
I hate reinventing the wheel.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic