avahi : System which facilitates service discovery on a local network ( http://avahi.org/ )
bind : BIND - Berkeley Internet Name Domain - Name Server ( http://www.isc.org/software/bind )
bind-tools : bind tools: dig, nslookup, host, nsupdate, dnssec-keygen ( http://www.isc.org/software/bind )
dnstop : Displays various tables of DNS traffic on your network ( http://dnstop.measurement-factory.com/ )
libidn : Internationalized Domain Names (IDN) implementation ( https://www.gnu.org/software/libidn/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a srcshelton
For Paludis use this rsync : rsync://gentoo.zugaina.org/srcshelton-portage
If you have a problem : ycarus(-at-)zugaina.org