Writing. How To Use An Apostrophe - The Oatmeal - Alpha’s Got the “Write” Stuff. Posted by Wolfram|Alpha is a great resource for writers.
It has an enormous words and linguistics database that writers can use for such things as word definitions, origins, synonyms, hyphenation, and Soundex lookups. Type “word contest”, and Wolfram|Alpha will retrieve the word data for the English word “contest”. Alpha Examples - Words & Linguistics.