These ebuilds come from http://github.com/sjnewbury/multilib-overlay.
If you have some problems, go to the official site first.
postgresql-base : PostgreSQL libraries and clients ( http://www.postgresql.org/ )
sqlite : A SQL Database Engine in a C Library ( http://sqlite.org/ )
unixODBC : A complete ODBC driver manager ( http://www.unixodbc.org/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a multilib
For Paludis use this rsync : rsync://gentoo.zugaina.org/multilib-portage
If you have a problem : ycarus(-at-)zugaina.org