Envoy - Visitor registration that's changing how guests are greeted in companies around the world.
WinDirStat - WinDirStat is a disk usage statistics viewer and cleanup tool, inspired by KDirStat.
The Receptionist - The Receptionost is a visitor managemnt solution that has visitor logging system to track visitor traffic.
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.
TractionGuest - Safe, secure workplace for all.
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.