LanguageTool - Grammar & Style Checker - Supports 25+ Languages, Plugins for Chrome, Firefox & GDocs
Check your texts for spelling, grammar and style issues everywhere on the web.
* Supports 25+ languages (English, German, Spanish, French, Dutch, Portuguese, ...)
* Open source (can be self-hosted)
* Plugins for Firefox, Chrome and Docs
Replies
ZOE by Protonet
I like the way it integrates easily. It is just added bonus, no need to learn new usage-patterns.
Pros:Very clever, easy to use.
Cons:None, so far.