pklite

from The Free On-line Dictionary of Computing (8 July 2008)

PKLITE

   <compression, tool> An executable file {compression} utility
   for {MS-DOS} from {PKWARE, Inc.}.  PKLITE compresses the body
   of the executable and adds a small, fast decompress routine in
   the header.  In many cases it performs better than {lzexe}.
   With {headpack} the output is smaller and cannot be
   decompressed.

   (1999-01-07)