Free online classified ads and job posting at Astanda.com
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http://www.doubletongued.org/
A growing dictionary of words from the fringes of English, including jargon, slang, and loan words. Browsable by category or searchable by letter. Includes analysis of new words, and modern connotations of words with old denotations.
http://www.english-dictionary.us
Fast no-frills English dictionary.
http://www.etymologic.com/
The brain-twisting etymology game.
http://www.ezresearch.com/reference/dict.html
Provides a directory of dictionaries.
http://www.wordfocus.com/
An advanced Latin-Greek-English vocabulary source of etymologies with thematic units of roots, prefixes, and suffixes, and vocabulary quizzes.
http://www.freedict.com/
English to/from Afrikaans, Danish, Dutch, Finnish, French, Hungarian, Indonesian, Italian, Japanese, Latin, Norwegian, Portuguese, Russian, Spanish, Swahili, and Swedish. Online version of the Freelang program.
http://tla.surly.org/
Terms commonly appearing in space-related newsgroups.
http://frankdietz.com/glossary.htm
Collection of more than 2400 links to glossaries and dictionaries.
http://www.lai.com/glossaries.html
Directory of multilingual dictionaries and dictionaries on specific subjects, alphabetized by language.
http://www.ccnphawaii.com/glossary.htm
A collection of soap making terms, definitions and acronyms.