Here are links to a few web sites that are related to traditional Irish music in some way. This is by no means a well selected list. It is merely a few links that I happened to have already coded from the distant past so it was relatively easy to quickly make them available here. Later I may find time to refine this list and make it much more up-to-date and relevant.
The New Zealand Sessions Tune Archive - This site has recordings of a large number of tunes that are often played in sessions but also provides a mechanism that makes it possible to slow the tempo of the tune without changing the pitch and select specific sections of the tune for looping. This can be a very useful tool for learning tunes and is free!
The Wellington Session - has a variety of useful resources for traditional Irish tunes including tune books, info and advice about resources learning tunes by ear including links to software, how to slow music you find on YouTube and more