System Master

System Master is a sophisticated system monitoring program for Windows. It offers the following features: Report space usage on one or more drives; Scan specified folders and report on the name and size of folders they contain; You can return information on ALL files inside a specified folder or just those that exceed a specified size; you can even use wildcards to restrict the search.

You can run the program unattended and have it automatically email results of scans to a specified email address. Different scan settings files can be created for different purposes and you can specify which set is to be used at different times.