One of my other projects is IrishDictionary.org, it’s an online collaborative Irish Gaelic dictionary.
By collaborative, this means that you can sign up and help build this dictionary from scratch. In June 2009, it reached a total of 1,000,000 searches, and it has over 280 activated accounts at the time of writing.
There’s also a PDF Irish Gaelic to English dictionary that you can download. It contains all the validated entries of the Irish dictionary.