The best 3D Touch apps are recommended by Apple through a new section of the App Store called Enhanced with 3D Touch.
In this new section of Apple promotes the best applications that support new 3D Touch and iPhone 6S implemented 6S Plus iPhone so that everyone can benefit from new technology applications very popular Apple App Store.
In the section Enhanced with 3D Touch promoted so normal applications that support 3D Touch, and games that have special functions available through this technology, so you get the titles specifically designed for it.
Since a few weeks Apple promotes sections of this kind only apps that are specifically chosen by its employees, you can be sure that no matter what choice you make for your terminals, it will be a smooth as possible.
Section Enhanced can be accessed by following this link.