You were wondering about LesGrandsVoisins.com? Good! Here is some info in French about:

• les cercles collaboratifs,
• la copropriété et
• les Voisins.

So this is a community-editable reference-documentation wiki. Create an account and document away (after I grant you necessary permissions). Commenting is deactivated, but you can ask for it to come back.

See here for what neighbors.fr is about. This wiki.LesGrandsVoisins.com is maintained in French first and foremost.