CleanMyMac X - Clean, protect and speed up your Mac
WinDirStat - WinDirStat is a disk usage statistics viewer and cleanup tool, inspired by KDirStat.
Warehousity - Warehousity is a new age, 4PL Tech-enabled On-Demand Fulfilment & Flexible Warehousing platform, co-creating a network of functional warehouses & 3PL operations across the country.
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.
Space Lens - Discover what’s taking up space on your Mac
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.