Spell check an entire project

It is not easy to deal with a large project including several .tex files. Sometimes I need to spell-check all files manually. Here is a solution, however it would be better to integrate this into an editor, like kile

https://paulbradley.org/aspell/

Collaborative editing

My first guess for collaborative editing was googledocs with latexlab as described here.
But this in my opinion has serious privacy issues.

Some other ideas are text tracking systems, like svn or git as back-end. A collection of possible methods can be found here.

However this topic is still unresolved.

Update: there are two main alternatives for online collaborative editing:

• Sharelatex
•  Overleaf