How to handle mutiple applications with same libraries?

[eluser]Unknown[/eluser]
I have two seperate applications in my applications folder. Both applications are using libraries like doctrine or twig.

Where is the best place to store this libraries once? Is it the sytems/libraries folder? I guess, no, because i dont want to have third party stuff in the system folder. Any ideas?

[eluser]Unknown[/eluser]
I found the solution by myself. Just add a further application 'common' in the applications folder and set the package path to these folder