This was part of libhnj library by Raph Levien. I've cut only hyphenation
part from it, to use in OOo.

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LibHnj is a library for high quality hyphenation and justification. It
is dual licensed under both LGPL and MPL to encourage widespread use.
The parseAFM.[ch] files are written by Adobe and distributed under a
slightly different license, but one that appears to be compatible with
both LGPL and MPL.

The code is currently fairly rough. In particular, psset has many
fixed-size buffers and is simply not suitable for production. Further
speedups are also possible, although the code isn't exactly slow now.