Have you tried? I haven't, but some of its content includes things that are available for Linux (such as ttx), plus Python and Perl scripts that are likely usable either standalone or with FontForge. The compiled things for which there is no source available is what needs work on the company's side to turn into a real FOSS release, but I'm not sure if any of those would be usable with WINE; it's certainly possible, since they are pretty small and self-contained. I have not delved into it, but it may be quite usable. Getting a better picture of how usable it is would be a good first step toward eventually shaping a real Linux release further down the road.