Organize - The file management automation software.
WinDirStat - WinDirStat is a disk usage statistics viewer and cleanup tool, inspired by KDirStat.
File Juggler - File Juggler is a Windows utility for automatic file management.
WizTree - WizTree quickly finds the files and folders using the most space on your hard drive. It scans the MFT (Master File Table) instead of crawling the entire disk which makes it very fast.
DropIt - Application to automatically process and organize your files, to move, compress, extract, rename, delete, list, send by mail, encrypt, etc. DropItDownload DropIt for free.
SpaceSniffer - SpaceSniffer is a freeWare (donations are welcome) and portable tool application that lets you understand how folders and files are structured on your disks.