FolderSizes goes far beyond the capabilities of competing solutions by combining several tools into one:
· Disk Space Explorer - Awesome detail view, coupled with stunning graphical bar and pie graphs
· Duplicate File Report - Quickly isolate and manage duplicate files within any folder or volume
· Largest Files Report - FolderSizes can quickly show you which files are eating up the most space
· Oldest Files Report - Use your own criteria to find old files that may no longer be needed
· Temporary File Report - Eliminate temp file clutter left over from software installs, downloads, browsing, etc.
· File Owners Report - Discover which users are consuming the most space on local and network drives
· File Types & Attributes Reports - See the distribution of disk space by file type or attributes
· Drive Space Monitor - Instant, at-a-glance view of any local, mapped, or removable disk
· File Sizes, Names & Dates Reports - NEW in 3.0! Powerful, customizable range-oriented file reports
· Scan Filtering - Filter file system scans by filename, date, owner name, and more
· Integrated Search - Search multiple paths by nearly any file criteria (including file owner)

What's New:
Version 4.8.2.92 (Released December 28, 2009):
* Feature: The search facility now provides file and folder count columns. These columns are hidden by default - enable them by right-clicking the search listing header and selecting them from the resulting pop-up list.
* Feature: Broadened the range of preset date ranges available in search / filtering facilities, and changed the phrasing to be more specific.
* Feature: All report generation processes now show indeterminate task bar progress animation on Windows 7.
* Feature: The main report, file report, and search windows now have a status bar pane that shows the number of folders being actively excluded.
* Feature: All status bar panes now resize themselves as needed, rather than adhering to a fixed width.
* Feature: Added the ability to cancel file report analysis and still show results (default is to cancel and discard results).
* Feature: Enhanced and expanded existing visual themes. The "modern" theme now offers blue, black, silver, aqua, scenic, and white color sets (the "traditional" them remains unchanged).
* Feature: Graph backgrounds now have the option (on by default) of matching the current visual application theme.
* Bug fix: In specific circumstances, file report generation scheduled tasks would not start correctly.
* Bug fix: If the Search Subfolders checkbox was disabled during a search, top-level folders would not be included in the search results.
* Bug fix: When using the search facility, application-wide folder excusions were being incorrectly shown in the search results.
* Bug fix: In some cases, it was possible to modify scan filter settings while report generation was in progress (should not be possible).
* Bug fix: Resolved a cache logic defect that could cause report metrics to be miscalculated under certain specific circumstances.
* Bug fix: Improved robustness when encountering certain rare file system corruption scenarios.
* Other: Minor bug fixes and cosmetic improvements.

Homepage - http://www.foldersizes.com