HELP - Data Dictionary type utilities

I had no response to a previous request so I'll try again. I'm looking for a package that will produce field definition/population reports from a variety of Database systems. I'll be talking to clients with legacy desktop/mini/client-server databases which haven't been properly documented. I'm sure there must be a product which I can use to document what they've got without having to do too much programming myself. Any help on this would be much appreciated. -- chris pegler