Netgen Symfony Tools
Netgen Symfony Tools is an eZ Publish 4 extension that provides a way to include Twig templates, as well as running Symfony sub-requests, directly from the eZ Publish legacy templates.
This extension is published under GNU GPLv2 license and as such can be freely used and modified.
License, installation instructions and usage examples
Project page
You can find the project page on projects.ez.no