Don’t know if something has gone wrong here, but the libraries:
Morphologie (by F. Voisin)
OMCS / OMRC (by M. Laurson and O. Sandred)
OM_ASX (by H. Tutschku)
OMPitchField / OMTimePack (by P. Nauert)
OMCombine (by M. Malt)
are currently unavailable from the website. The page just loops back to the forum.
OMTristan appears to have problems loading on OM 6.6 Windows…(does it even work on windows? I’m not sure from the docs)