Folder Size for Windows adds a new column to the Details view in Windows Explorer. The new column shows not only the size of files, but also the size of folders. It keeps track of which folders you view, and scans them in the background so you can see complete size of all files within the folder. It’s very useful for cleaning up your disk.
Folder Size for Windows runs on Windows 2000 and XP. Folder Size for Windows is written in C++ using Microsoft Visual Studio .NET 2003.