Today I had an idea integrating modX in Laravel 5.
You can do this by just installing modX in public folder of Laravel and bootstrap modX as a service in Laravel config/app.php.
Service, Controller and route files can be found in the following gist.
https://gist.github.com/mylgeorge/2a8ce9dd47650b3e756289209d717a63
I didn't provide any views but its simple creating one. Any view will have $modx instance injected.
Edit 27/03/2018
Package for integrating modX in a Laravel project.
https://github.com/mylgeorge/laravel-modx
[ed. note: mylgeorge last edited this post 6 years, 10 months ago.]