cabextract is Free Software for extracting Microsoft cabinet files,
also called .CAB files, on UNIX or UNIX-like systems. cabextract is
distributed under the GPL license. It is based on the portable LGPL
libmspack library. cabextract supports all special features and all
compression formats of Microsoft cabinet files.
Microsoft cabinet files are used to distribute all kinds of data and
software: core Web fonts, Longhorn videos, operating system updates
and video codecs, to give some examples.