Resources for the Dutch language

Official word list of the Dutch language
List of words in the official normative spelling of the Dutch language in accordance with the Green Booklet (het Groene Boekje) of the Nederlandse Taalunie
Unofficial word list of the Dutch language
List of words in the unofficial normative spelling of the Dutch language in accordance with the White Booklet (het Witte Boekje) of Onze Taal
Inventio
Look up the gender of Dutch nouns
Onze Taal
Advice on Dutch language usage
Geographical names
Foreign geographical names in Dutch

Resources for the English language

Merriam-Webster dictionary
Extended edition of the famous American online dictionary and thesaurus
Merriam-Webster visual dictionary
Visual Dictionary Online
Urban Dictionary
The slang dictionary written by its users
OneLook Reverse Dictionary
For when that one word evades you
Acronym finder
Find out what any acronym, abbreviation or initials mean
Paul Brian
Common English language errors
The Eggcorn Database
A collection of unusual English spellings
Definitions etc.
Abbreviations, conversions, definitions, quotations, synonyms and references
British National Corpus
A hundred million word collection of samples of both written and spoken language from a wide range of sources, designed to represent a broad cross-section of modern British English.
Oliver Strunk
The elements of style
Google UK
Google UK, exact search

Trados Studio TM and TB Converter
Free Trados Studio TM and TB converter
IntelliWebSearch
IntelliWebSearch is an indispensable research tool for any translator! And as IWS provides a application independent search capability across the operating system, I highly recommended it for use outside the office as well
Handleiding HTML
Your definitive Dutch HTML and CSS resource

Best podcasts for translators
Overview of the best podcasts for translators
Startpagina
The go-to place for finding the right translator (Dutch)
Inter-Active Terminology for Europe
The EU inter-institutional terminology database
de Recensent
Independent music, film and literature reviews in Dutch