Disk Redactor 

Disk Redactor is WIPE utility, that prevent restoration of the old ( deleted ) files at your disks. All free space at your hard disk will be wiped from an old information.
disk wipe file wipe disk redactor delete file remove file clean file clear file clean folder

Cyteg SpaceChecker 

Do you notice that free space on your hard drive decreases with a time? You must periodically comb out thoroughly the whole disk in search of rubbish. "SpaceChecker" will show you, where exactly, in what folders and how many rubbish there was appear.
space check disk drive free clear folder directory size occupied cyteg usage control rubbish