Utility to find date and size of files.

[Andrew Black]

I am looking for a tool that will give me the following information for
each directory in a tree
- size used (including all subdirectories)
- time of most recent modification (again including files in
  subdirectories)
Current requirement is for Windows, but might be useful on other
platforms too. 

I would like the result as a text file.  Before I start rolling my
own, I was wondering if this wheel had been invented already.

Andrew