

Antidote. From Druide Informatique is a great set of spellcheckers (and gramamtical guides) for French and for English.
Alas, a few years ago they dropped their Linux version. Also, it’s not from the EU but from Canada… which has not yet been invaded by the USA.
Edit: too many things to list, I’m tired (and I don’t have Antidote on my Linux machine)
As an Infomaniak user myself, I don’t feel much need to complain or to ask for help but I would not mind a community where people can discuss ideas, tips & tricks and why not, ask for help. Maybe all what’s needed for this to happen is someone to start doing it?
So, if you feel like it, don’t be afraid to start such a community. Worse case, it won’t get much traction and no harm will be done. Best case, you maybe surprised to realize a few people were looking for exactly that ;)