1)   SizeExplorer Pro 4.1
Powerful disk space usage analyzer with folder size, charts, statistics, duplicates finder, clickable reports, complete file listing, exports, printing, search, file management, loading and saving of explorations (snapshots) and compare of snapshot.

 2)   O&O DiskStat Professional Edition 1
O&O DiskStat is a high-power tool for analyzing the used disk space on your storage volumes. With an easy-to-use interface, you can take a closer look at the file and folder structure of your internal and external drives.