Links:

Spanish Royal Academy Dictionary:
www.rae.es

Lexicographical Dictionary
buscon.rae.es/ntlle/SrvltGUILoginNtlle

Anaya Dictionary:
www.diccionarios.com

Vox Dictionary:
www.vox.es/consultar.html

Synonyms Dictionary:
tradu.scig.uniovi.es/sinon.html

The "portress’s" dictionary:
www.xcastro.com/portera.html

Internet Dictionary:
www.geocities.com/s4049/

Wine Dictionary:
www.filewine.es/dicciona.htm

Spanish Vade-Mecum:
www.efe.es/esurgente/lenguaes/

Art Glossary:
perso.wanadoo.es/salarich/glosariouno.html

Basque Dictionaries:

3000 hiztegia:
www1.euskadi.net/hizt_3000/indice_c.htm

Sinonimoen hiztegia:
www1.euskadi.net/hizt_sinon/indice_c.htm

Elhuyar hiztegia:
www1.euskadi.net/hizt_el/indice_e.htm

Euskalterm:
http://www1.euskadi.net/euskalterm/indice_e.htm

Dictionaries other languages:

Eurodicautom:
http://europa.eu.int/eurodicautom/login.jsp

English/ Spanish Dictionary:
www.spanishdict.com/

Logos Dictionary:
www.logos.it/dictionary/owa/old_dictionary.splg=ES

Merriam-Webster Dictionary:
www.m-w.com/dictionary.htm

Euro Terminology Glossary:
europa.eu.int/comm/translation/euro/euesfram.htm

Dictionaries in several languages:
dictionaries.travlang.com/spanish.html

Caló (Spanish Gypsies’ Language) -Spanish Dictionary:
caf.cica.es/mundo_flamenco/calo/vocabulario.html

Spanish/ English Glossary:
www.latimer.com.ar/miscelaneas/dic_cast-ingl.htm

Netlogs Dictionary:
wwli.com/translation/netglos/glossary/glossary.html

Websites of interest:

Official Bulletins:
www1.euskadi.net/instituciones

Inter-institutional style book:
eur-op.eu.int/code/es/es-cover.htm

Le site d'Elra:
www.icp.grenet.fr/ELRA/fr/home.html

On Spanish:
www.el-castellano.com

The Spanish Language Page:
www.dat.etsit.upm.es/~mmonjas/espannol.html