packmail.tar.Z - packmail Package a set of files for easy mailing

PKWARE, Inc. - PKZIP 2.51 for Unix(available versions are Linux, AIX, HP-UX, Digital, SCO or Solaris) has enhanced features such as viewing and extracting from TAR, GZIP, UUencode, XXencode, MIME and BinHex file formats and creating self-extracting files.

sq.tar.Z - sq squeeze (compress) files