This nifty tool takes Irish input and spits out dictionary definitions and morphological analysis of each word; it will also provide all other forms of the words if you ask it to. I should add that this is Modern Irish we’re talking about; if you tried to do it for Old Irish the computer would probably shriek, gibber, and die. (Via ilani ilani.)
Hmm, it analyses “tobann” as a morphological variant of “ann” in “Rinneadh í go tobann.” Oops.
You can use Kevin Scannell’s “caighdan” tool to convert old irish into modern Irish: https://github.com/kscanne/caighdean
Very cool, thanks!