LanguageTool
Free proofreading tool for OpenOffice, LibreOffice, Firefox, and Chrome. Also available as a standalone application. Supports about 20 languages (on different levels) and allows customization.
Spelling checker. Checks HTML, TeX/LaTeX, RTF, and ASCII (plain text). Hotkey spell checking in WordPad, Notepad, Email, browsers, etc.
Spelling checker. Checks HTML, TeX/LaTeX, RTF, and ASCII (plain text). Hotkey spell checking in WordPad, Notepad, Email, browsers, etc.
Free proofreading tool for OpenOffice, LibreOffice, Firefox, and Chrome. Also available as a standalone application. Supports about 20 languages (on different levels) and allows customization.
Freemium
Ginger Keyboard is the world’s first smartphone keyboard to offer advanced writing tools, including live as-you-type proofreading, alongside standard and advanced keyboard features like word prediction, autocorrect, emoji and swipe typing.
Freemium Windows Android iPhone Android Tablet iPad Chrome OS
Whether you’re writing a letter or an email, a simple click of a button will open some of the most comprehensive and useful language resources ever created.
Commercial
Grammar & Spelling Check; Free Online Proofreading; No Downloads...Allows you to find those pesky mistakes and correct them before your teacher does...
Freemium Web
cocoAspell is Mac OS X interface to Aspell – A more intelligent Ispell – that is being developed by Kevin Atkinson. Aspell is an Open Source spell checker designed to...
Free Open Source Mac OS X
SpellCheckPlus is a grammar checker that finds common spelling errors and grammatical mistakes in English.
Freemium Web