archive (zip) files : BiGZiP

archive (zip) files : Zzip

archive (zip) files : 7-Zip

archive (zip) files : jzip.org

backup files and folders : Amanda

backup files and folders : BackupPC

backup files and folders : NasBackup

backup files and folders : Abakt

compare/differentiate/merge different files/folders : KDiff3

compare/differentiate/merge different files/folders : WinMerge

convert ASCII files between Win and Unix : Tofrodos

copy a data CD : CDRDAO

display size/space of folders on a drive : WinDirStat

encrypt a file : AxCrypt.

encrypt a file : Blowfish Advanced CS.

encrypt drives/folders/files : TrueCrypt

grep in windows : GREP for Windows

rename multiple files : Ant Renamer

search HTML and office documents : DocSearcher

search file/text on the computer : The File Seeker

search file/text on the computer : Wilbur

search file/text on the computer : Wilma

search files on the computer/intranet : MaxFisher

search text within files : AstroGrep

securely exchange files via p2p : Waste

Check out more free software : I want a Freeware Utility to ... 450+ common problems solved.

Suggestions/corrections : eConsultant : Blog Archive : I want Open Source Freeware