Can anyone upload good examples of symfony applications from the git?

Question

symfony

Good time, who can tell you, throw in a few options for best practices in your opinion developed applications for symfony 3, symfony 4?
The main bias is of course on the symfony 4 version. It is now interesting how the abstractions of the application are laid out and separated there.
In addition to organizing business logic on symfony4, approaches to working with the front are interesting, both on the administrative part and on the public one, if there are examples with angular, react, vue it will be a plus, it would be very interesting to dig and analyze examples of someone's practices, thanks for any hints and links.

Answer 1

Here is, in my opinion, a rather interesting project https://github.com/EnMarche/en-marche.fr

Answer 2

https://github.com/Sylius/Sylius
4 are going to be migrated, everything is fine with the code there