I've separated this into Irish and non-Irish sites and then individual categories.
EasonsFree shipping over €10:
ElaraBased in Dublin, order online only, free delivery or pick up in person:
JeweleryButton & Bow Factory, hand-craft by Irish artisans or something:
Pharmacy and Gifts
Cara Pharmacy.Based on West coast, can pick up items in shops or pay for delivery, they have locations in Donegal Town and Bundoran:
T-ShirtsHairy Baby, Irish themed humourous T-shirts:
RTEIrish TV shows etc, also including Irish related books.
Non-Irish sitesUse Parcel Post to get UK or NI shipping rates. This is useful if you live in Ireland and are near a Parcel Motel office, basically they will provide you with a UK PO Box and then delivery your packages to one of their Irish offices for fee.
BooksBook Depository, free shipping world-wide including Ireland. Often their prices are lower than Amazon.
Everything sitesSites that sell everything, from books to electronics to clothing to toys etc.
House of Frasershipping to Ireland on orders over 50 sterling:
I've duplicate this as a page on the blog, it's available at:
http://donegalfriends.blogspot.com and click on the Tab at the top of the page.