WinDirStat - WinDirStat is a disk usage statistics viewer and cleanup tool, inspired by KDirStat.
LogicGate - The LogicGate platform empowers businesses to build agile enterprise process applications that deliver workflow automation and process efficiency
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.
SAI360 - GRC Platforms
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.
DataGrail - The Age of Privacy requires a new standard of transparency