Springround Overlays Your Springboard on Opened App
Springround is an upcoming tweak from Andrea Oliva that lets you access the Springboard without closing the app you currently have open.
Using an Activator action the Springboard is overlayed on the open app and can be interacted with as normal. A press of the home button makes the Springboard disappear.
Springboard is set to hit the Cydia Store soon. You can take a look at the tweak being demonstrated by Redmond Pie in the video below.