Free Disk Space Analyzer

Folder Size FREEWARE will analyze your hard drives and display the file and folder sizes so that you can easily check the distribution of your disk space. The application will display the sizes of the folders and files and also the percentage of the total disk size that they occupy. The neat report can be sorted in order to identify the largest folders and the largest files. You can easily figure out which files or folders have filled up your dive space as Folder Size will also scan the sizes of all the subfolders. The application can scan your entire hard drive in minutes due to its optimized scan algorithms. The progressive scan will let you continue the scan from the point of interruption.
Besides scanning an entire hard drive Folder Size can also scan a single folder in order to save time.
Find and display all file and folder sizes.
Scan entire storage device or a chosen folder.
Display the file and folder sizes in different charts - Bar Chart, Pie Chart etc.
Detailed information for all the files and folders listed in table:

* Name
* Folder size
* Size percentage from the parent folders size
* Files count inside the folder
* Subfolders count
* Creation time
* Last modification time
* Last access time Folder owner and group

Sort option based on all the different criteria listed above - folder name, folder size etc.
Option to rearrange the columns in the list in order to suit your preferences.
Option to display the file and folder sizes in Bytes, Kilobytes, Megabytes, Gigabytes or automatically determine the most appropriate size format.
Locate selected folder or file in Windows Explorer via a context menu
Show Windows folder or file properties dialog
Delete folders or files.
Open files with associated application using double click.
Remove folders or files from the list in order to check the folder size after deleting the item.
Support for all types of storage devices - hard drives, CDROM, USB Drives, Floppy disks
Progressive scan. If you have stopped a scan it will continue form the point of interruption saving processing time. If you have removed items from the list consequential scan will be very quick by only updating the missing items.
Easy Explorer-style navigation via Back, Forward and Folder Up tool buttons
Detailed disk size information list including - total disk size, drive used space and drive free space.
Intuitive Explorer-style user interface and rich documentation

WinDirStat is a disk usage statistics viewer and cleanup tool for Microsoft Windows.
On start up, it reads the whole directory tree once and then presents it in three useful views:
* The directory list, which resembles the tree view of the Windows Explorer but is sorted by file/subtree size,
* The treemap, which shows the whole contents of the directory tree straight away,
* The extension list, which serves as a legend and shows statistics about the file types.
The treemap represents each file as a colored rectangle, the area of which is proportional to the file's size. The rectangles are arranged in such a way, that directories again make up rectangles, which contain all their files and subdirectories. So their area is proportional to the size of the subtrees. The color of a rectangle indicates the type of the file, as shown in the extension list. The cushion shading additionally brings out the directory structure.