Home page for the entire suite (in French) with some screenshots: https://lasuite.numerique.gouv.fr/
Code bases are on GitHub and they use English there: https://github.com/suitenumerique/
Dev handbook (in English): https://suitenumerique.gitbook.io/handbook
Not French and I can't say I personally tried deploying any of them, but I've been admiring their efforts from afar for a while now.
There's a chance to unlock tremendous value for society here.
Imagine if you could fix all the awful bugs making video conferencing software shitty for you! It's perhaps the most bug-plagued software out there in the world, with the highest number of complaints I have ever seen.
We've had a large detour away from open-source running the core of the internet, at least outside of web pages, but this sort of software feels like we're getting back to the 90's and earlier.
Vive la France!