f2j : Fortran-to-Java translator, especially for BLAS, LAPACK and ARPACK ( http://icl.cs.utk.edu/f2j/ )
kotlin-bin : Statically typed programming language for modern multiplatform applications ( https://kotlinlang.org/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a spark-overlay
For Paludis use this rsync : rsync://gentoo.zugaina.org/spark-overlay-portage
If you have a problem : ycarus(-at-)zugaina.org