Statistics websites and studies

Hi bros, I found an interactive map that shows where french foreign residents are.

It can help some of us to understand where people are moving.

Do you think it can be helpful for you to share here some statistics websites and studies? For market studies for examples or to confirm/infirm some bias.

Edit :

an other one here (in French). The title says it all but for non-frenches it asks to parisians (especialy girls) if they want to « mix » with people from poor suburban cities (with lot of african-north african descendants).