Do Grammar Checkers Work?  
   Critical report on the effectiveness of Grammatik V based on samples of essays by EFL students. Paper presented at EUROCALL.
   http://www.camsoftpartners.co.uk/euro96b.htm

Machina Sapiens  
   Software company specializing in linguistic engineering. The Bilingual Grammar Checker, El Corector, CorText, programs for French, English, and Spanish, for Linux and Windows.
   http://www.machinasapiens.com/

Verbix  
   Software for conjugating verbs in modern and extinct languages, including English. Free to use online or pay for the downloadable version.
   http://www.verbix.com/

Grammar Slammer  
   Grammar reference in Windows Help file format. Shareware.
   http://englishplus.com/gramslam.htm

WordWeb Developer  
   WordWeb Developer's COM object allows you to add thesaurus/dictionary functionality to your applications.
   http://wordweb.info/developer/

Wordz Toolbar  
   Free, instant, one click access to dictionary and thesaurus definitions and spell checking from a toolbar on your web browser. Free software that contains no adware or spyware. By Socket Software.
   http://www.socketsoftware.com/Products/wordz/index.php