WinDirStat - WinDirStat is a disk usage statistics viewer and cleanup tool, inspired by KDirStat.
SAI360 - GRC Platforms
TreeSize - TreeSize tells you where precious disk space has gone to.
Fastpath Assure - Fastpath Assure is a cloud GRC platform that integrates with various ERP systems
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.
AuditBoard - AuditBoard is a platform that offers compliance and audit management that allows auditors to analyze, manage, and report the business operations.