The Ancestor Hunt blog has a list with links for Ireland Free Online Historical Newspapers.  

There are links by County and also some by city.  

If you scroll down, be sure to take a look at Villanova University’s Digital Library.  The digitized newspapers in this collection can be downloaded.

(This was another valuable tip from IGSI Co-President, Donna Jones. You, too, could share your discoveries with other blog readers by sending them to us at blog@irishgenealogical.org.)