Folder Size for Windows adds a new column to the Windows Explorer details view that displays the sizes of files and folders. A service scans your hard disk in the background and caches the results. Designed for performance!
Worked Great on XP, win7 not so much. put it back as a column please
Interesting tool!! Other than this, One of the interesting tools that I found recently is DuplicateFilesDeleter.It is tool that can be used to find & remove duplicate files.It is a simple to use,but very effective tool to locate duplicate files in one or more selected search paths.It scans the files and compares them based on Byte for Byte Comparison, which ensures 100% accuracy. You can then choose to delete the selected duplicate or original files. The program is multi-threaded which enhances the performance immensely & performs scans very quickly.You should try it.