The Society of Genealogists has added 4,000 Irish will abstracts to its online database (SoG Data Online).
The abstracts were compiled by Lorna Rosbottom and donated to the library in 1986. Although the vast majority of wills were proved in Irish courts, a few of them relate to other countries. No other information has been provided, and I haven't been able to uncover more details, except that all the searches I have made resulted in matches from the 18th and early 19th centuries.
You can search the abstracts for any names you are researching (here), but to view the abstract itself, you will be need to be a member of the Society of Genealogists.