emount : mount/unmount create/remove dm-crypt filesystems according to your /etc/fstab ( https://github.com/vaeth/emount/ )
encfs : An implementation of encrypted filesystem in user-space using FUSE ( https://vgough.github.io/encfs/ )
squash_dir : Keep directories compressed with squashfs. Useful for portage tree, texmf-dist ( http://forums.gentoo.org/viewtopic-t-465367.html )
squashfs-tools : Tool for creating compressed filesystem type squashfs ( https://github.com/plougher/squashfs-tools/ https://git.kernel.org/pub/scm/fs/squashfs/squashfs-tools.git http://squashfs.sourceforge.net )
squashfuse : FUSE filesystem to mount squashfs archives ( https://github.com/vasi/squashfuse )
squashmount : Keep directories compressed with squashfs. Useful for portage tree, texmf-dist ( http://forums.gentoo.org/viewtopic-t-465367.htm )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a mv
For Paludis use this rsync : rsync://gentoo.zugaina.org/mv-portage
If you have a problem : ycarus(-at-)zugaina.org