> sci-libs/openfoam
sci-libs/openfoam is available at
https://github.com/OpenFOAM, including old versions for slots 2.{2,3,4}, each in it's own repository. I haven't checked whether those ancient version still compile, with the sources from github, but I've started working on a bump to current version 7, some time ago, after I noticed that parmgridgen isn't building and I didn't find any updates for it.
I would consider taking responsibility of the package for the new versions, once my ebuild is ready and get's accepted into the tree, as it's a package which can be supported by freecad, on which I'm actively working for almost a year now.
Thanks all!