LookDisk is a Freeware-Disktool with following functions:


Search for duplicate files by name or content 
Search for files using various parameters (file size, date, attributes)
Search for a text in any file (also within PDF-Files)
Display disk overview (total size, free space)
All search functions support following archive types:

            ZIP, CAB, ARJ, RAR, LZH, 7-Zip, TAR, GZIP (*.gzip, *.gz. *.z)

User entries are saved and do not have to be re-entered each time LookDisk is started. 

Download: LookDisk
Download Portable Version: LookDisk (no installation required)

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Softoxi.com editor team:
"LookDisk - smart, handy and reliable freeware tool that lets you easily find and remove duplicate files, find files or text in files, and view various disk details."