Possibly the swiftest route to your roots.
Irish genealogy website directory.
www.genuki.org.uk/contents/
Description:
This page will help you to find your way around the GENUKI hierarchy. It focuses on the key areas you will need to know about for your research, and provides an explanation of their relation to each other, and to the whole. There is a site map diagram, which represents the levels of the GENUKI structure: the UK & Ireland, Regions within the UK (England, Ireland, Scotland, Wales, the Isle of Man, or the Channel Islands), followed by the (pre-1834) Counties (shires), which lead to a number of Parish pages.