Sharelatex

@00taffe I don't know all the alternatives, I heard of Papeeria too ! Let's focus on sharelatex, they are the one who got me into latex, because the interface is user friendly and they have a very good SEO. They also seem to have a neat integration with Dropbox and Github which I did not find elsewhere. Finally https://fr.sharelatex.com/learn/ is a good documentation with practical use cases.

@00taffe share latex compiler is more forgiving than overleaf. The find and replace features in sharelatex is much better too.

@soueuls I try Sharelatex ;)