emacs.d VS Emacs-langtool

Check my configuration, https://github.com/redguardtoo/emacs.d "A fast and robust Emacs setup".

Ideally the startup time could be 0.5 seconds. But in order to reach this goal, you need a bit knowledge of Emacs Lisp. You also need read the code of other distributions. https://github.com/redguardtoo/emacs.d

check my setup, https://github.com/redguardtoo/emacs.d

https://github.com/redguardtoo/emacs.d is my configuration with all the packages.

https://github.com/redguardtoo/emacs.d/blob/master/lisp/init-evil.el is my evil related setup.

You could use my config (https://github.com/redguardtoo/emacs.d/) or whatever 3rd party config as the base to build your own config.

Check my modeline setup which is optimized for high performance. https://github.com/redguardtoo/emacs.d/blob/master/lisp/init-modeline.el

Language Tool does this, I believe, but I think it's modal rather than on-the-fly.

Perhaps something like https://github.com/mhayashi1120/Emacs-langtool which you can self host. Or if you don't mind SaaS - there's grammarly integration for emacs too.

There’s already Emacs package, but it works only with offline version.

https://github.com/mhayashi1120/Emacs-langtool

Now that I checked, looks like there’s another package, but I didn’t t try it.

https://github.com/emacs-languagetool

Check out textidote too. It's languagetool understanding \LaTeX syntax, and you can set it for flycheck-checker. Emacs-langtool coupled with langtool-ignore-fonts is also good for \LaTeX documents. You may want to configure them to disable a few rules to reduce false positives.

I use https://github.com/mhayashi1120/Emacs-langtool

Didn't see it so far: LanguageTool integration in Emacs. It really helps me a lot, as I'm a making lot of language errors. LanguageTool requires Java (standalone app is a Jar file), could start is a bit long, but then it's really easy to use and for me feedback is better integrated in Emacs than for example in LibreOffice.