atompaw : PAW atomic data generator ( http://users.wfu.edu/natalie/papers/pwpaw/man.html )
fullprof-bin : Crystallographic tools mainly for Rietveld analysis ( https://www.ill.eu/sites/fullprof/index.html )
genfit : Generic toolkit for track reconstruction in physics experiments ( https://github.com/GenFit/GenFit )
mc-tester : Comparisons of Monte Carlo predictions in High Energy Physics ( http://mc-tester.web.cern.ch/MC-TESTER/ )
openmx : Material eXplorer ( http://www.openmx-square.org/" # no https, SSL invali )
qcl : Quantum Computation Language with an emulator of a quantum computer ( http://tph.tuwien.ac.at/~oemer/qcl.html )
quinoa : Adaptive computational fluid dynamics ( https://quinoacomputing.org/ )
tauola : Tau decay Monte Carlo generator ( https://tauolapp.web.cern.ch/tauolapp/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a science
For Paludis use this rsync : rsync://gentoo.zugaina.org/science-portage
If you have a problem : ycarus(-at-)zugaina.org