HiddenMe - Hide desktop icons with a single click.
WinDirStat - WinDirStat is a disk usage statistics viewer and cleanup tool, inspired by KDirStat.
Camouflage - Do you have way too many items on your desktop? Do you hate cleaning up that mess?
TreeSize - TreeSize tells you where precious disk space has gone to.
Pliim - One click and be ready to go up on stage and present!
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.