I actualy use this on 2 sites, one in development and closed for public, another one one a WAMP server.
You can make statistics on anything on your DOCman site. Top viewed documents, top download, download graphics, top categories…
Actually for both I make a ranking of:
-Top downloaded documents, and this for all category's (so, don't use a filter)
There are a lot of possibility's to set the filter. Easy to use. Now on every download page at the bottom, everyone can see what is the most downloaded one.
A must have for DocMan users... because it is easy configurable and there are a lot of possibilities.