Afrikaans <-> English:
http://www.freedict.com/onldict/afr.html
http://dictionaries.travlang.com/AfrikaansEnglish/

Breton <-> English
http://www.francenet.fr/~perrot/breizh/dicoen.html

Chinese <-> English
http://www.ok88.com/go/svc/ecdict.html
http://zhongwen.com/

Czech <-> English
http://www.slovnik.cz/

Danish <-> English
http://www.freedict.com/onldict/dan.html
http://dictionaries.travlang.com/DanishEnglish/

Dutch <-> English
http://www.freedict.com/onldict/dut.html
http://www.littleexplorers.com/languages/dutch/
http://dictionaries.travlang.com/DanishEnglish/

Esperanto <-> English
http://wwwtios.cs.utwente.nl/traduk/EO-EN/Traduku/

Esperanto <-> French
http://dictionaries.travlang.com/EsperantoFrench/

Estonian <-> English
http://www.ibs.ee/dict/

Finnish <-> English
http://www.freedict.com/onldict/fin.html
http://dictionaries.travlang.com/FinnishEnglish/

French <-> English
http://www.freedict.com/onldict/fre.html
http://www.littleexplorers.com/French/
http://humanities.uchicago.edu/forms_unrest/FR-ENG.html

Gaelic <-> English
http://www.ceantar.org/Dicts/index.html

Gamilaraay <-> English
http://coombs.anu.edu.au/WWWVLPages/
AborigPages
/LANG/GAMDICT/GAMDICTF.HTM

German <-> English
http://dict.leo.org/?lang=en
http://quickdic.org/index_e.html
http://dict.tu-chemnitz.de/
http://www.tu-chemnitz.de/urz/netz/forms/
dict.html

English -> German
http://www.iee.et.tu-dresden.de/cgi-bin/cgiwrap/wernerr/search.sh
http://www.littleexplorers.com/German/

Greek-> English
http://users.otenet.gr/~vamvakos/alphabet.htm

English -> Greek
http://www.perseus.tufts.edu/cgi-bin/enggreek

Hawaiian <-> English
http://www.hisurf.com/hawaiian/dictionary.html

Hmong – English
http://ww2.saturn.stpaul.k12.mn.us/hmong/
dictionary/
hmongeng/hmongeng.html

Hungarian <–> English
http://dictionaries.travlang.com/
HungarianEnglish/
http://www.freedict.com/onldict/hun.html

 

Indonesian <-> English
http://www.freedict.com/onldict/ind.html

Italian <-> English
http://www.freedict.com/onldict/ita.html
http://www.aromatic.com/itaeng/
http://dictionaries.travlang.com/EnglishItalian/
http://www.littleexplorers.com/Italian/

Japanese <-> English
http://www.freedict.com/onldict/jap.html
http://www.littleexplorers.com/languages/
Japanesedictionary.html

Khowar -> English
http://www.ishipress.com/khow-lst.htm

Latin <-> English
http://www.freedict.com/onldict/lat.html
http://www.nd.edu/~archives/latgramm.htm
http://dictionaries.travlang.com/LatinEnglish/

Maori <-> English
http://www.learningmedia.co.nz/ngata/

Norwegian <-> English
http://www.freedict.com/onldict/nor.html

Norwegian <-> Swedish <-> Danish
http://www.nada.kth.se/skandlexikon/

Polish <-> English
http://galaxy.uci.agh.edu.pl/~polak/slownik/

Portuguese <-> English
http://www.freedict.com/onldict/por.html
http://dictionaries.travlang.com/PortugueseEnglish/
http://www.if.ufrj.br/general/dictionary.html
http://www.littleexplorers.com/Portuguese/

Russian <-> English
http://www.freedict.com/onldict/rus.html

English -> Russian
http://www.cs.chalmers.se/~andrei/dictionary/

English -> Romanian
http://info.utas.edu.au/docs/flonta/DP,1,1,95/
dictionary.html

Sanskrit <-> English
http://www.alkhemy.com/sanskrit/dict/

Slovene <-> English
http://www.ijs.si/cgi-bin/rac-slovar

Spanish <-> English
http://www.freedict.com/onldict/spa.html
http://www.littleexplorers.com/languages/
Spanishdictionary.html
http://dictionaries.travlang.com/SpanishEnglish/

English -> Spanish (Computing)
http://www.css.qmul.ac.uk/foreign/
eng-spanish.htm
http://www.telefonica.es/fat/elex.html

Sranan <-> English
http://www.sr.net/srnet/InfoSurinam/sranan.html

Swahili <-> English
http://www.freedict.com/onldict/swa.html

Swedish <-> English
http://www.freedict.com/onldict/swe.html
http://www.littleexplorers.com/Portuguese/
http://www-lexikon.nada.kth.se/skolverket/
swe-eng.shtml

Taiwanese <-> English
http://daiwanway.dynip.com/cgi/tdict.acgi/

Thai <-> English
http://lexitron.nectec.or.th/

Tibetan <-> English
http://www.nitartha.org/
dictionary_searchback.html

Tsalagi <-> English
http://public.csusm.edu/guests/raven/
cherokee.dir/
cherlexi.html

Urdu <-> English
http://www.cs.wisc.edu/~navin/india/
urdu.dictionary

Welsh <-> English
http://oldweb.cs.cf.ac.uk/fun/welsh/
LexiconForms.html

Yiddish <-> English (Picture)
http://www.ibiblio.org/yiddish/Vort/