Irish
The Alternative Irish Gaelic Dictionary
http://www.notam02.no/~hcholm/altlang/h ... aelic.html
Slang and off-colour offerings.
GaelDict 98
http://www.ceantar.org/Comp/GAELDI98.HTML
Gaelic Text Database - An Milliún Focal Conallach, móide cnuasachtaí beaga de théacsanna Muimhneacha, Connachtacha agus Albanacha. Fourth internet release, 1998.
Gramadach Lexicon
http://www.ceantar.org/Dicts/Gram/index.html
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).
An Tobar
http://www.smo.uhi.ac.uk/~smacsuib/bng/tobar/
Tearmai Gaeilge don Earnail Phoibli. Useful Irish terms for the Public Sector.
Scottish Gaelic / Gaelic :
Faclair na Pàrlamaid
http://www.scotland.gov.uk/dictionary/gedt-00.asp
Gaelic-English and English-Gaelic dictionaries of words and phrases useful in discussing government and politics.
MacBain's Dictionary
http://www.ceantar.org/Dicts/MB2/index.html
An Etymological Dictionary of the Gaelic Language.
The School Gaelic Dictionary
http://www.ceantar.org/Dicts/MF2/index.html
Prepared for the use of learners of the Gaelic language by Malcolm MacFarlane.
Manx:
Fockleyr Gaelg - Baarle
http://www.ceantar.org/Dicts/Manx/index.html
A searchable Manx-English dictionary.
Cornish:
http://www.egt.ie/gram/ecd.html English-Cornish Dictionary
Catalan:
The Alternative Catalan Dictionary
http://www.notam02.no/~hcholm/altlang/ht/Catalan.html
Catalan slang - a part of The Alternative Dictionaries collection.
Catalan-English Vocabulary
http://sola-sole.com/vocabul.htm
Monodirectional word list with pronunciations.