Much as with Nodling’s equivalent utilities for Ultima 4, these files let you decode (decompress) LZW-compressed data files that Ultima 6 uses, and then re-encode them in a way that Ultima 6 can read (although not with the LZW algorithm, which was patented at the time these utilities were written). Nodling Dragon points out that when one uses the encoder, the resultant file will be a bit larger than the equivalent “original” file, for this reason.

NOTE: the packages here include only the source code necessary to compile a command-line utility in each case.