polyxmass is looking for a new maintainer; the original author has moved to a Qt environment for a new version called massXpert (source available). For GNU to be a coherent system, we want all GNU packages to support GTK. Therefore the best approach is probably to maintain polyxmass as a GTK port of massXpert.
If you're interested, please take a look at this general information about GNU packages and being a GNU maintainer, and then email email@example.com with a bit about your background and interest. Thanks!