Info-ZIP provides both command line zip and unzip utilities as well as graphical front-ends (GUI shells) to run those tools. Ports of this open source software are available for a variety of operating systems, including Windows 9x/ME/NT/2000/XP/CE/etc (even Windows 3.x), Linux, MSDOS, FreeDOS, Mac OS, Mac OS X, Amiga, Atari, BeOS, FlexOS, Human68K (X68000), MVS / OS/390 Open Edition, Novell Netware, OS/2, QDOS / SMSQ, RISC OS, Tandem NSK, AIX, CLIX, Convex, Digital Unix (OSF/1, Tru64), Unix, FreeBSD, HP-UX / MPE/iX, NetBSD, QNX, SCO Unix, SGI Irix, Solaris / SunOS, VM/CMS, VMS, etc. The tools zip, unzip and WiZ (the graphical front-end), as their names suggest, only handle the zip archive format.
