RidNacs is a free and very fast disk space usage analyzer for Windows. ...more

ncdu (NCurses Disk Usage) is a disk utility for Unix systems. ...more

JDiskReport enables you to understand how much space the files and directories consume on your disk drives, and it helps you find obsolete files and folders. ...more

SpaceSniffer is a freeWare and portable tool application that lets you understand how folders and files are structured on disks. ...more