OK, here's a link to Richard Robinson's Tunebook. With an ABC player, you can go there and be in Celtic heaven. Richard's tunes used to be just on GIFs or some other format that was daunting to those of us who don't play an instrument. He converted all his songs to ABC, and they're great. He has links posted to ABC players you can download, or you can use the link above and go to the ABC home page.
-Joe Offer-