An Tobar: Tearmai Gaeilge don Earnail Phoibli. Useful Irish terms for the public sector.
GaelDict 98: Gaelic Text Database - An Milliún Focal Conallach, móide cnuasachtaí beaga de théacsanna Muimhneacha, Connachtacha agus Albanacha. Fourth internet release, 1998.
Gramadach Lexicon: Simple printout of the lexicon used by the Gramadach computer programs. Translations are from a lot of places (Foclóir Póca, GAELIC-L, word-of-mouth, &c).
Irish Dictionary Online: Searchable bilingual dictionary.
Irish Gaelic - All Things Irish: Ask for an Irish Gaelic translation on the translator forum and listen to Irish language phrases.
Irish Gaelic Translator: Translate to and from Irish Gaelic, and listen to Irish Language phrases.
The Alternative Irish Gaelic Dictionary: Slang and off-colour offerings.