Druide Antidote - Que vous rédigiez une lettre ou un courriel, cliquez sur un bouton et voyez s’ouvrir un des ouvrages de référence parmi les plus riches et les plus utiles jamais produits.
LanguageTool - Free proofreading tool for OpenOffice, LibreOffice, Firefox, and Chrome.
Grammarly - Clear, effective, mistake-free writing everywhere you type.
Enchant - The easiest way to scale personalized customer support
WhiteSmoke - WhiteSmoke software products for writing and language. WhiteSmoke is a grammar checker, spell checker, style checker and more - in a single package. Also featuring translation software and English video courses.
GNU Aspell - GNU Aspell, usually called just Aspell, is a free software spell checker designed to replace Ispell.