A new jailbreak tweak called Force Touch Activator was recently released on Cydia's BigBoss repo, and it lets users on older hardware running iOS 8 mimic the 3D Touch effect that's headlining the launch of the iPhone 6s.
Real 3D Touch requires a pressure sensitive screen, which is a part of the new hardware found in the new iPhone 6s. Older hardware, like the iPhone 6, lacks the pressure sensitive screen, so jailbreak tweak developers have to look for unique ways to try to bring similar functionality to older devices.
I'll be honest and say that Force Touch Activator is pretty much nothing like 3D Touch—you don't have the nuanced sensitivity levels, you don't have haptic feedback, and most importantly, you lack a true pressure sensitive screen—but it's an interesting tweak for jailbreakers to try nonetheless. Watch our hands-on video walkthrough inside, and see for yourself.