I know this, let's assume to be a duplicate question and an answer was already posted here, but my question is entirely different.
I want to know if there is a grammar (not only spell) checking tool (for English) available to be installed on Ubuntu, so that its use is not limited to only LibreOffice, but also can be used for Skype (or other messaging apps), documents (LibreOffice, WPS Office, Geany), notes, memos, everything.
I would be thankful to everyone who tries to answer - or corrects me, or lets me know if this question doesn't make sense.