PeaZip free archiver utility is a portable, open source archiving, encryption and file split tool.
PeaZip is cross platform and runs on 32 and 64 bit Windows (9x, 2000, XP & Vista) and Linux. It acts as a graphical front end for several tools that provide archiving, compression, encryption, and similar functions.
PeaZip allows to edit, save and restore archive's layouts; apply powerful multiple filters to archive's content; handle multiple archives at once; export job definition as command line; encrypt with AES256 etc.
Other features of PeaZip: split/join files (file span), wipe files (secure deletion), compare, checksum and hash files, system benchmark, generate random passwords and keyfiles.