gcc-switcher : Switch gcc's version per package ( https://github.com/megabaks/gcc-switcher )
portconf : /etc/portage cleaner ( https://github.com/megabaks/portconf )
portopts : quick set opts per package ( https://github.com/megabaks/portopts )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a stuff
For Paludis use this rsync : rsync://gentoo.zugaina.org/stuff-portage
If you have a problem : ycarus(-at-)zugaina.org