1)   DirSize 4.7.1
Command line tool that can easily be automated to generate nightly reports of disk space usage, network space hogs and very large folder trees. Reports can be sorted and small folders can be prevented from being displayed.
branch, cluster, directories, directory, dirsize, disk, display, filename, hard, long,

 2)   Ace File Shredder 1.1
Prevent deleted files or sensitive data from being recovered with our efficient digital file shredder, able to shred files, folders, and wipe free disk space to prevent previously deleted files from being recovered.
file, shredder, digital, erase, encrypt, secure, wipe, free, space, disk,